black alloy one piece cantilever Vector Optics scope ring with anti-cant. Has see through design (with anti-cant removed). Suitable for any centrefire guns and .22 guns and airguns with a 20mm weaver / picatinny rail. fits 30mm scope tube and 1" scope tube with provided spacers. 187g. 4 screws per ring. 40mm base to centre. 58mm between rings. 150mm overall length. New but not in original packaging.