Ideal accessory for long range shooters who must avoid even the slightlest cant, the Vector Optics ACD Offset Bubble level ring can be mounted on your 34mm scope tube easily. Install it on your scope to be sure to dismiss any canting issues for good.

‌Tech specs:‌

• Diameter: 34mm
• Length: 54mm (2.1in)
• Width: 8mm (0.3in)
• Weight: 17g (0.6oz)
• Finish: black matte
• Anti cant device mount 
• Air bubble floating to indicate level situation
• High quality 6063 T6 aircraft grade aluminum alloy
• Including items: hex key