US Night Vision Objective Lens Cap for PVS-7/PVS-14/6015. S.NightVision USNV-18 PVS-7/PVS-14/6015 Objective Lens Caps fit PVS-7 PVS-14 6015 or USNV-18 night vision monoculars by US NightVision. These US Nightvision Accessories protect and keep clean your nightvision device's front lens when it is not in use. Protective Cap for USNV-18 has a pinhole that allows you to test your nightvision device during the day. The other fetaure of these objective lens caps is that they protect the intensifier tube if the unit is accidentally activated in a bright-light condition. Specifications for U.S. NightVision USNV-18 Objective Lens Cap: Manufacturer: US Night Vision Color: Black Width: 6 in Height: 4 in Additional Features: Fits PVS-7/PVS-14/6015 Package Contents: U.S. NightVision USNV-18 Objective Lens Cap 000501: U.S. NightVision USNV-18 Objective Lens Cap