Keson DG30M Depth Guage 30 Meter

Developed for seismographic measuring, these tough fiberglass tapes are used by a variety of industries to measure depth. Attach any weight to the snap ring and lower to measure depth. The depth gauges are incredibly durable, flexible and lightweight, with graduations printed in black and red on white under a clear coat. Numbers are graduated on both sides from the weighted end of the tape strap. Tensile strength is 100 kg (200 pounds).