Includes: Scope Ring Set, Screws Mount Type: Picatinny Materials: 6061 Aircraft Grade Aluminum Finish: Type III Compatibility: 30mm Tubes Weight: 3.3 oz Length: 0.65 in Width: Varies Color: Black Warranty: Lifetime Line up your shot at the exact height you want it with the Monstrum Challenger Scope Rings! Each set of scope rings is precision crafted to a given height specification. Choose the height that matches your particular rifle setup and preferred cheek weld. Your shot is lined up just where you want it every time.