Digital Shell Measuring Caliper
Digital Caliper for measuring shells
A quick, easy, and accurate way to measure your hermit crabs shell opening.
Reads in mm or inches, comes with battery included plus a spare battery.
Measuring your Hermit crabs shell opening will give you a 100% accurate reading of what size shells you should offer in their tank, saving money on shell purchases by only purchasing the correct sizes needed! These can be safely used even if your crab won't go into their shell during measuring.
Measures from 0-6 inches, on/off button.