.cs3388614{text-align:left;margin:0pt 0pt 10pt 0pt;line-height:1.15;text-indent:0pt} .cs95B300B{11pt;font-weight:normal;color:#000000;font-style:normal;Calibri;} These Australian Made Thermal Targets have been specifically designed for zeroing and calibrating Thermal Scopes. It includes 44 x repair patches (22 silver and 22 black). They measure 20cm x 20cm. The bullseye is 40mm. The target is adhesive and comes with a corflute backing. We have specifically designed the rings to be highly visible with a thermal scope to make sighting in easy. The target relies on reflection for the camera to pick up the image, so the target must be set on a tilt of roughly 100 degrees and to be stuck on a flat surface to be effective. The target is visible at night and day time.