Features:1 of aluminium alloy, this helmet mount is durable and uneasy to break 2 three set of screw bolts and screw nuts that are included, you must easily upload this helmet mount at the back aspect of your helmet 3 for FAST ACH helmets, for MICH helmets, for PASGT helmets and for light-weight (marine) helmetsSpecification:Material: aluminum alloy Size: 10*9CM