The Wilcox L4 G11 Non-Breakaway Mount with Horn Interface Shoe allows firm attachment of the AN/PVS-7B/D and AN/PVS-14 arm to a MICH/ACH helmet when attached to the included WIlcox One-Hole Shroud, Three Hole The NVG mounting system prevents breakaway of the mount, thereby reducing risk of loss of the NVG. NVG Helmet Mount Kit Includes: L4 G11 Mount, Wilcox 1 Hole Shroud, Allen Key & Mounting Hardware. Features Non- Breakaway Design Low Profile Stance Built-in Auto-off Feature Specifications Dimensions: 4.65"( )L x 2.58" (W) x 3.80" (H) Weight: 6.35 oz Compatible With: PVS-14, PVS-7 Vertical Height Adjustment: .90" Total Travel Fore/Aft Travel: 1.60" Total Travel Tilt to Horizon: 12 Above, 5 Below Flip: 110Adeg