Made by high quality Nylon FiberWorks with FAST Helmet railsUse it to mount lights and cameras to the helmetCan quickly attaches or releases from the rail systemSpecifications:Material: Nylon FiberWeight: 22gColor: BlackTube Diameter: 21mmhelmet mount adapter??flashlight mount??Flashlight Mount Holder??Flashlight Laser mount??Tactical Airsoft Fast Helmet??21mm??camera for helmet??Head-mounted cameras??Rail System??nylon fiber??