ANVIS Helmet Mount Compatible with AVS-6 AVS-9 Night Vision GoggleAviation helmet mount for ANVIS type night vision systems Works with any night vision system that uses aviation style ball detent interface AN AVS 6, AN AVS 9, AN AVS 10, GPNVG 18, AN PVS 23, F4949, M949, AN PSQ 36, Sentinel, etc. Standard 4 hole mounting pattern for installation of 4 hole drilled flight helmets Includes shim for optional attachment to 4 hole pattern ground combat helmets Standard LEMO ANVS power cable for connection to your power