Hawke Sport Optics 22100 Match Mount Rings, 1 inch Diameter 9-11mm Rail and 1.6 inch Height (2 Piece) Dimension- 1 inch Diameter 9-11mm Rail and 1.6 inch Height (Low) Internal cushion tape prevents marking and damage Recoil Stop Pin Matte Black Anodized Aluminum Alloy Double Hex Screws Hold Scope in Place Precision engineered from high grade aluminium with rounded edges prevent scope damage