[ Material ]: Made by 500D Nylon and metal weight block.
[ Usage ]: Use to balance your helmet when using night vision goggles. //Each of counter balance weight is about 50g and can be customized with less weight
[ Installation]: Mount to the rear of helmet // Unscrew the two screws at the back of the helmet and stacking the balance weight on the helmet and tight them.
[ Suitable ]: Perfect for FAST BJ PJ MH and other FAST tactical helmets.