Package includes: 30mm Dovetail Scope Mount Rings; Allen Key Fits 30mm riflescope tube and 11mm dovetail rail. Shock proof design for high recoil rifles. Specification: Material: Hight quality aluminum alloy Color: Matt black finish Inner Ring Diameter: 30mm (1.18") Rail Width: 11mm (3/8") Features & details 1.42" height scope mount compatible with air rifle scopes with 30mm tube. 30mm scope rings fit 3/8'' or 11mm dovetail rails. Shock proof design for high recoil rifles. Built-in tape inside scope rings provide cushioning and prevent slippage of the scope in the rings, offering easy installation and secure fit. One of the scope rings features a stop pin, for rock solid application. Made out of durable high quality material - 6061-T6 aluminium alloy. Sturdy and durable.