Internal Energy Thermal Targets are a great training aid for you to zero in your thermal scope on the range! These passive targets are an inexpensive way to train without the requirement of a power source. Just peel and stick the backer and apply to your substrate and you’re ready to practice with your new target and hone in your IR optic. Your target will appear black or white depending on the contrast setting of your optics, best vied in black hot setting. These economical passive thermal targets help prepare you for that critical shot. Dimensions: 4″ x 4″ Mounting: Attach to silhouette substrate using peel and stick substrate.. 30 Targets in one package!