Precision engineered from high grade aluminum with rounded edges prevent scope damage. Configuration: 2 Piece Ring Size (Diameter): 25.4mm 1" Height: Medium Rail: Weaver Fixings (Rail & Top Cap): Double Hex Screw Internal Cushion: Yes Retractable 'Recoil Stop' Pin: No Height: 44mm 1.7" Weight: 82g 2.9oz