Shellfish Measuring Gauge – Dual 150mm Crab & 87mm Lobster Tool

Fast, Accurate Field Compliance Checks for Coastal & Boat Fishing

Measuring legal minimum landing sizes at sea or on wet coastal rocks requires robust, saltwater-proof tools. Metal gauges can corrode, scratch equipment, or add unnecessary weight to gear bags, while cheap molded plastics easily warp in sun or crack under foot.

Designed and manufactured in the UK by an engineer with over 30 years of precision CAD and tooling experience, this dual 150mm and 87mm marine gauge is built for fast, accurate size verification. Engineered with precision openings for standard 150mm crab and 87mm lobster minimum legal limits, it allows recreational and commercial fishers to check catches instantly before landing.

Key Marine Engineering Features & Field Benefits

• Dual 150mm & 87mm Precision Slots: Features an 87mm slot for lobster carapace checks and a 150mm slot for crab width checks—giving you two essential compliance checks on a single compact tool.

• 100% Weatherproof Marine PETG: 3D-printed using high-density, marine-grade PETG polymer. It will not absorb water, degrade under UV rays, or snap when dropped on wet rocks or boat decks.

• High-Visibility Contrast Markings: Printed in high-visibility yellow with bold red digits, making size dimensions easy to read in direct sunlight, low light, or through sea spray.

• Lightweight & Field-Ready: Engineered for minimal bulk in tackle boxes, fishing vests, or catch bags while maintaining structural rigidity across both measuring slots.

• Fully Custom Sizes & Combinations: Need specific regional slot sizes (e.g., 140mm, 160mm, or custom Ormer/Abalone dimensions)? Gauges can be custom-modeled and printed to your exact millimeter specifications.

Technical Specifications & Marine Fitment

• Gauge Slot Dimensions: 150mm Width Slot (Crab) & 87mm Length Slot (Lobster)

• Target Species: Edible Brown Crab, Velvet Swimming Crab, and European Lobster

• Material: Outdoor Marine-Grade PETG Polymer

• Standard Supply Color: High-Vis Yellow Body with Contrast Red Digits

• Manufacturing Origin: Designed & Made in the UK

Package Contents

• 1x Dual-Slot (150mm / 87mm) Crab & Lobster Measuring Gauge

Custom Sizes & Color Requests

• Custom Dimensions: If your local district, county, or fishing club requires different minimum legal slot sizes, message us prior to ordering and we will update the CAD model to your exact specs.

• Custom Colors: Standard delivery ships in high-visibility Yellow/Red. Custom colorways (such as High-Vis Orange, Marine Blue, or Black) are available upon request.