ATNA(R) Thermal Targets make it quick and easy to zero your thermal scope, eliminating the frustration of finding a hot or cold target. The Targets utilize a special material in conjunction with an included heat source to provide a highly visible thermal signature that's easy to pick up in your scope. Allows you to quickly and easily zero your thermal scope Unique material with included heat source provides a highly visible thermal signature Includes (3) 16x16" Thermal Targets Order today!