Brand N/AModel N/AQuantity 2 piece(s) per packColor BlackMaterial Aluminum alloySuitable Gun Type Can be used with diameter of 30mm gun tactical accessories; Common broad gauge (20mm)Specification Easy installation; Comes with a wrenchRing Diameter 30mmPacking List 2 x Gun mounts1 x Allen wrench<img src="http://112.74.112.28/down/products/255319/255319_000.jpg" noproxy>