This plastic card set is a must have for anyone using GPS, Map and Compass. The set features 3 clear cards with 1:25,000, 1:50,000 1:100,000 and 1:250,000 map scales. The set also includes two white cards with survival tips, signaling tips, instructions on how to read a topographic map, how to adjust for declination, how to determen distance traveled, how to use UTM with your GPS and compass, and how to travel an azimuth. Printed on 30 Mil plastic credit card stock. Made in the USA.