CENTERLINE HEIGHTS 1 inch: 30mm: Low: 0.8 in Low: 0.9 in Medium: 1.00 inch Medium: 1.00 inch High 1.26 in High 1.26 in Includes: Super Duty Scope Rings, Hardware Materials: 6061 Aircraft Grade Aluminum Compatibility: Rifles with Picatinny rails Weight: 5.8 oz Diameter: 30 mm Scope tubes Color: Black Warranty: Lifetime Torque Specs: Mount Base: 20 in-lbs | Scope Rings: 18 in-lbs Line up your shot at the exact height you want it with the Monstrum Super Duty 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.