I.Product specifications Locks in position at 0, 45, 90, 135, 180 degree Operator can easily access on/off button with thumb while using a vertical grip Molded reinforced polymer composite Color: BK/DE/OD Compatible with: Fast/Mich helmets Size: 70(L) x 20(W) x 55(H)mm Mount Diameter: 1' / 25mm Weight: 65g Package List:1*Mount