Description: Aluminum Alloy material, anti-vibration, durable yet lightweight. Holding night vision device or other accessories Suitable for nighttime hi-tech games and hiking. Fit for Helmet M88 . With screw and locknut Specification: Color: Black Base Size: Approx4.5x7.5cm/1.77x2.95", Arm Distance: 9cm/3.54" Package Includes: 1 Piece Night Vision Goggles Holder(helmet not included)