This flir breach front objective protection shield is an accessory you can use to protect the objective lens of your flir breach thermal imaging monocular from scratches and impacts. in addition, this lens does not affect the thermal image of the camera. this protection lens is custom made and is therefore only suitable for the flir breach ptq136. The protection is made of sturdy aluminum (6061 alloy) and has cutouts of 5.9mm. this prevents, for example, airsoft balls from hitting the lens. the protective lens weighs only 15 grams. Application flir breach ptq136 front objective protection shield This accessory is useful in any situation where the lens of your thermal imaging camera can be damaged (for example, during airsoft). but also in any other situation where you want to provide the lens with extra protection, this protective shield is a valuable addition. Note: in the end it's more advantageous to order this protection lens in one of the available kits with helmet bridge (see optional accessories).