Specification: 
Major Color: Matte black 
Material:Aluminum alloy 
Fit for Scope with 30mm Diameter 
Features:Riflescope Bubble with Level compass 
Diameter             Width             Thickness        Height       Weight 
30mm/1.18''   4.8cm/1.88''     1.4cm/0.55''   4cm/1.57''     43g （吸卡包装）26g（opp袋装）