Feature A 100% avoid CANT A with One Inch Adapter Ring A Easy to Use A Designed for Real Fire Caliber A Full Metal Picture Specification A 100% avoid CANT A Install on 30mm and 25.4mm one inch riflescope A Length: 14mm (0.55 inch) A Weight (net): 40g (1.4 ounce) A High-durability aluminum alloy in black matt and beautiful complement A Shock proof can be used on real fire caliber A Can mount either side of the scope (bubble on the top) A With paper instruction, easy to use without special tools