Durable Lexan® resin won't melt, warp or break in extreme temperatures — guaranteed! 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. Made in the USA. Lifetime warranty.

Dimensions13-1/4" x 4"