£7.99
In stock
You are just £80.00 away from Free Mainland UK Delivery!
Our entire team at Gerry’s are all experienced anglers and can help you choose the correct tackle for any fishing situation. Please drop us a message or give us a call if you need any help.
You can return unused standard items within 30 days for exchange or refund.
We check our prices weekly to ensure we can combine our fabulous service with the best prices. If you find an item cheaper and in stock somewhere else, drop us a a message in the chat box and we can see what we can do.
This item is available for next day delivery. You can pick this in the checkout.
We offer free post to any mainland UK address with a basket of more than £80. We also send all over the world and the best way to find out how much postage you will pay is in our checkout. Add the items to your basket and then add your address. Our checkout will automatically calculate your total.
We have come from a tiny fishing store and grown into one of the biggest fishing tackle retailers in the UK winning countless awards over the years. We are still a family business offer fabulous service online and in-store.
Spread the cost of larger orders over 6 or 12 month 0% APR. We also offer longer terms with APR charges via V12 finance. Available in the checkout.
You can make your next purchase a little easier on the wallet by splitting the total into 3 payments by using Klarna payments in the checkout.
“Need advice on tackle? Ask Bob”
Powered by a deep library of angling knowledge, the experience of thousands of anglers & indepth technical product specs. Available 24/7. Just Ask.
Consistency is the absolute secret to building a successful swim. Whether you are feeder fishing for bream at 60 meters, wrapping your lines around distance sticks, or clipping up on a busy commercial lake, hitting the exact same spot cast after cast is what separates the top match anglers from the rest. The Guru Line Marker Pen is a simple, highly effective tool designed to give you absolute visual confirmation of your fishing distance without damaging your line.
Engineered with a high-visibility, fast-drying formula, this marker pen allows you to easily paint a distinct, bright mark onto your monofilament or braided mainline. By using a line mark in combination with your reel’s line clip, you can quickly check if your distance has slipped after a heavy fish or confidently re-clip at the exact same range if you have to change rigs mid-match.
| Feature | Specification |
| Primary Function | High-visibility mainline distance marking |
| Color Options | High-Viz White / Fluorescent Orange |
| Line Compatibility | Safe for Monofilament, Fluorocarbon, and Braided mainlines |
| Formula Type | Non-toxic, water-resistant, fast-drying |
| Line Impact | 100% safe – zero structural degradation or chemical wear |
| Removal Method | Easily rubs off under friction with fingers when changing distances |
| Applicator | Precision fiber-tip marker |
When casting repeatedly to an established feeding zone, relying solely on your reel’s metal line clip can occasionally be risky—especially when targeting hard-fighting carp that might pull the line out of the clip on the take. By applying a 1-inch block of color to your line right in front of the reel spool or first rod guide, you can visually verify that your line hasn’t slipped a single turn.
Many standard industrial or stationery markers contain harsh chemical solvents like acetone that can instantly weaken monofilament or strip the protective coatings off high-end braided lines. Guru has specifically formulated this pen to be completely inert. It sits cleanly on top of the line fibers without penetrating or burning the material, ensuring your breaking strain remains completely uncompromised.
The ink is engineered to dry in seconds and resist washing off when flying through the water or clicking through the rod rings during a hard cast. The vibrant pigment stands out clearly against dark lake water, clear skies, and low-light dawn or dusk conditions. When it is time to pack up or change your swim distance, the mark can simply be rolled off the line using the friction of your thumb and forefinger.
Pro Tip: For the best and longest-lasting mark on the bank, pull the section of line you want to mark tight, and wipe it dry with a towel before applying the pen. Rotate the line slightly as you run the marker tip along a 2-inch section to ensure full coverage around the entire diameter. Give it about 10 seconds to fully air-dry before winding it back onto the spool or casting out.
Feeder & Method Feeder Fishing: Perfect for match and pleasure anglers on commercial waters who need to hit the exact same shelf, island margin, or open-water hotspot.
Float & Slider Fishing: Excellent for marking deep-water slider float setups on natural venues to ensure your depth setting remains perfectly consistent after catching heavy fish.
Carp & Specimen Angling: Ideal for marking mainlines when using distance marker sticks, allowing you to instantly re-clip your fishing rods or spod rods to your exact mapped-out spots.
No, it is designed to be semi-permanent. It is highly water-resistant and will comfortably survive a full day of heavy casting and winding. However, if you need to clip up at a different distance or fish a completely new spot, you can easily scratch or rub the dried ink off with your fingernails without needing to cut or damage your line.
Yes. The formula works exceptionally well on both surfaces. Because braid is naturally absorbent, the mark will grip tightly to the woven fibers. On monofilament and fluorocarbon, it forms a bright, durable outer sleeve that remains highly visible.
Not at all. The ink dries incredibly flat and smooth against the line’s profile. It passes effortlessly through tight tip rings and micro-guides without creating friction, casting resistance, or leaving sticky residue inside the ceramic linings.
“Need advice on tackle? Ask Bob”
Powered by a deep library of angling knowledge, the experience of thousands of anglers & indepth technical product specs. Available 24/7. Just Ask.
Our entire team at Gerry’s are all experienced anglers and can help you choose the correct tackle for any fishing situation. Please drop us a message or give us a call if you need any help.
You can return unused standard items within 30 days for exchange or refund.
We check our prices weekly to ensure we can combine our fabulous service with the best prices. If you find an item cheaper and in stock somewhere else, drop us a a message in the chat box and we can see what we can do.
This item is available for next day delivery. You can pick this in the checkout.
We offer free post to any mainland UK address with a basket of more than £80. We also send all over the world and the best way to find out how much postage you will pay is in our checkout. Add the items to your basket and then add your address. Our checkout will automatically calculate your total.
We have come from a tiny fishing store and grown into one of the biggest fishing tackle retailers in the UK winning countless awards over the years. We are still a family business offer fabulous service online and in-store.
Spread the cost of larger orders over 6 or 12 month 0% APR. We also offer longer terms with APR charges via V12 finance. Available in the checkout.
You can make your next purchase a little easier on the wallet by splitting the total into 3 payments by using Klarna payments in the checkout.




Penn Chest Size Guide
Small (36″-37″)
Medium (38″-40″)
Large (42″-44″)
XLarge (46″-48″)
XXLarge (50″-52″)
Wader Waist Guide
Small (28″-30″)
Medium (30″-33″)
Large (34″-37″)
XLarge (37″-39″)
XXLarge (39″-42″)
3XLarge (42″-45″)
Kinetic/Westin Chest Size Guide
Small (36″-37″)
Medium (38″-40″)
Large (42″-44″)
XLarge (46″-48″)
XXLarge (50″-52″)
3XLarge (54″-56″)
Grundens Chest Size Guide
Small (36″-37″)
Medium (38″-40″)
Large (42″-44″)
XLarge (46″-48″)
XXLarge (50″-52″)
3XLarge (54″-56″)
Vass Chest Size Guide
Small (36″-38″)
Medium (38″-41″)
Large (42″-44″)
XLarge (45″-46″)
XXLarge (47″-48″)
3XLarge (49″-51″)
Trakker Chest Size Guide
Small (38-40″)
Medium (41-43″)
Large (44-46″)
Xlarge (47-49″)
XXLarge (50-52″)
XXXLarge (53-55″)
Korda Chest Size Guide
Small (36″-38″)
Medium (38″-41″)
Large (42″-44″)
XLarge (45″-46″)
XXLarge (47″-48″)
3XLarge (49″-51″)
Guy Cotten Chest Size Guide
Small (86 – 94cm)
Medium (94 – 102cm)
Large (102 – 110cm)
XLarge (110 – 124cm)
XXLarge (124 – 134cm)
3XLarge (134 – 154cm)
Fox Chest Size Guide
Small (36″-38″)
Medium (39″-41″)
Large (42″-44″)
XLarge (45″-47″)
XXLarge (48″-50″)
3XLarge (51″-54″)
4XLarge (55″-60″)
Nash Chest Size Guide
Small (36″-38″)
Medium (39″-41″)
Large (42″-44″)
XLarge (45″-47″)
XXLarge (48″-50″)
3XLarge (51″-54″)
4XLarge (55″-60″)
Aqua Chest Size Guide
Small (38-40″)
Medium (41-43″)
Large (44-46″)
Xlarge (47-49″)
XXLarge (50-52″)
XXXLarge (53-55″)
Guru Chest Size Guide
Small (36″-38″)
Medium (38″-41″)
Large (42″-44″)
XLarge (45″-46″)
XXLarge (47″-48″)
3XLarge (49″-51″)
Preston Chest Innovations Size Guide
Small (36″-38″)
Medium (38″-41″)
Large (42″-44″)
XLarge (45″-46″)
XXLarge (47″-48″)
3XLarge (49″-51″)
Trouser Waist Guide (Inches)
Small – 28″ – 32″
Medium 32″ – 34″
Large – 34″ – 36″
X-Large 36″ – 38″
XX-Large – 38″ – 42″
XXX-Large 42″ – 46″
XXXX-Large 46″ – 52″