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Official Store of Mighty Marker® by Arro-Mark®, 70+ Years of Craftsmanship.
Manufacturer of Specialty Paint & Ink Markers in the U.S.A.

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Specifications
Permanence Permanent
Marker Type Oil-based Ink
Opacity Opaque
Actuation Valve Controlled
Content Capacity 10ml
Surface Features
Surface Polyurethane
Application Temperature use at -50°F to 150°F (-46°C to 66°C)
Nib Details
Stroke Widths Available 2.3mm Bullet, 4.0mm Chisel
Nib Types Available Dual Reversible Medium Bullet & Chisel
Nib Features

The reversible dual-sided nib pairs a 2.3mm bullet tip for consistent, everyday marking with a 4.0mm chisel tip.

Use the pointed edge for fine detail on small tags, or the broad edge for quick coverage on larger
marking areas.

Need Custom Sizes & Colors?
We can accommodate custom requirements → Request a Custom Solution
Durability
Resistance & Durability Water Resistant, Weather Resistant, Fade Resistant, Abrasion Resistant, UV Light Resistant
Outdoor Longevity 10+ years
Uses
Application Outdoor, Indoor
Industries Identification, Inspection
Description

The Mighty Marker® IM-31 Arro-Tag Clip Medium uses a specialty oil-based ink that bonds into polyurethane tags and surfaces rather than sitting on top, resisting rub-off from handling, abrasion, and weather exposure. It's valve-controlled for consistent ink flow with every press, no drips or dry starts.

You'll never get this mark out of a polyurethane tag. These pens are used to permanently mark animal tags. 

The reversible dual-sided nib pairs a 2.3mm bullet tip for everyday marking with a 4.0mm chisel tip, use the pointed edge for fine detail or the broad edge for quick coverage, and a pocket clip keeps it within reach.

Water, fade, abrasion, and UV resistant, it's built for harsh outdoor conditions and rated for use from -20°F to 150°F (-29°C to 66°C). The 10mL reservoir marks hundreds of tags before replacement.

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Hazmat Information

Our products are not corrosive to metal. For Industrial use only. Keep away from children. WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov.

Why Buy A Mighty Marker

Behind every Mighty Marker is 70+ years of craftsmanship, in-house formula development, custom engineering, and compliance-ready manufacturing. Designed to solve your exact marking challenge.

Built on Craftsmanship Since 1956

That craftsmanship runs deep. Arro-Mark®'s team develops formula chemistry, tests surface compatibility, and validates performance under real industrial conditions. Expertise comes with the marker.

Formulas Developed by Arro-Mark

Every Mighty Marker® formula is proprietary. What's in the marker is developed and manufactured exclusively by Arro-Mark® in Englewood, NJ. That means consistent performance, batch after batch.

Engineered for Your Application

When standard markers don't cut it, come to Arro-Mark® directly. Our team works with you to engineer marker solutions for your surfaces, conditions, compliance requirements, mark size, and color - not a generic substitute.

Compliance? Come to the Source

Low-chloride, MIL-spec, ASTM, nuclear-grade - if your application requires certified documentations, Arro-Mark® has it. We've been supplying compliance-ready markers to regulated industries for decades.

Frequently Asked Questions

Do I need to prime this marker before use?
This marker has valve-controlled ink flow. Press the tip down before use to start the flow.
Will this mark last outdoors?
Yes. Mighty Marker® Arro-Tag is water, fade, abrasion, and UV resistant, rated for use from -20°F to 150°F (-29°C to 66°C).