Made of ABS plastic, sturdy and durable. Bendable side rail fits for any place of most helmet's curved surface. Can quickly mount a variety of accessories to helmets. For flashlight, camera, visor and other attachments. Compatible with MICH 2000 Helmets, M88, Fast, ARC, ACH, etc. Specification: Material: ABS Plastic Rail Size: approx. 16x3.5cm / 6.3x1.4inch Screw Length: approx. 1.5cm / 0.6inch Hook & Loop Size: approx. 16.5x3.5cm / 6.5x1.4inch Color: Black, Tan, Green Package Includes: 1 Piece Helmet Side Rail 2 Pieces Screws 2 Pieces Hook & Loops Note: Please allow slightly size error due to manual measurement. Color might be slightly different since different monitor and light. Please make sure you don't mind before you order. Thank you.