Durable Lexan resin won't melt, warp or break in extreme temperatures guaranteed! The Fixed Lexan Plotter 13" features 8 scales to meet the needs of all VFR aeronautical charts; nautical on one side, statute on the flip. Nautical-statute conversion scale also included. Quick scale reference is provided for both statute and nautical miles. This Fixed Plotter is made in the USA. Lifetime warranty. 13-1/4" long.