The Freshwater Trout Combo Release Ruler is the perfect companion to any fishing trip for trout. Are you wading, kayaking, fly-fishing for a trophy trout? The Freshwater Trout Combo Release Ruler is lightweight and can fit into a backpack or small compartment. The contrasting color combinations provide easily readable measurements for a quick release, including the patented weight estimation of trout. The Freshwater Trout Combo Release Ruler will allow you to measure, remember, and release your trophy catch. Stop guessing! Use the Release Ruler today. The ruler is made from a durable PVC stiff enough to lay flat on a deck or bank or your lap and still be rolled up easily for storage.