All aluminum alloy material, Light Weight. Takes the place of the other PVS 14 J arm that is easily broken or not easily adjustable. The NVG helmet mount is made of high-quality aluminum alloy with high oxidation resistance, solid , wear-resistant and comfortable. The installation process is straightforward. The night vision mount securely attaches to your night vision goggles. Once properly mounted, the goggles feel secure and stable, even during intense movements. Available in both bayonet and dovetail, this friction set mount allows for fast, easy, travel from left to right eye, and back again. Adjustment Functions: Ergonomically optimized vertical, tilt and front and rear eye distance adjustment rods can be customized to suit the user experience Multifunction :This mount helmet mount is suitable for night vision goggles, such as PVS-14, PVS-18, PVS-15 ,L4 G24, L4 G22E and GPNVG18. Also suitable for most helmets, such as: ACH, PASGT, MICH, M88