Durable Lexan® resin won't melt, warp or break in extreme temperatures — guaranteed! Rotating azimuth eases flight planning with direct course readout. 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. Made in the USA. Lifetime warranty

Dimensions13-1/4" x 4-1/4"