CENTERLINE HEIGHTS 1 inch: 30mm: 34mm: Low: 0.8 in Low: 0.9 in Low: 1.10 in Medium: 1.00 inch Medium: 1.00 inch Medium: 1.26 inch High 1.26 in High 1.26 in High 1.45 in Includes: Deadlock Scope Rings, Hardware Materials: 6061 Aircraft Grade Aluminum Compatibility: Rifles with Picatinny rails Weight: 5.8 oz Diameter: 1 inch or 30mm Scope tubes Color: Black Warranty: Lifetime Torque Specs: Mount Base: 20 in-lbs | Scope Rings: 18 in-lbs Deadlock Pro Series Scope Rings offer an added layer of protection over our standard Deadlock Series Scope Rings. They are put through a rigorous hardcoat anodization process - providing a more rugged, more scratch resistant surface With a rigid beefed-up design with strategically placed lightening cuts to reduce weight - the Monstrum Deadlock Series provides rock-solid mounting of your rifle scope at the absolute minimum amount of weight possible. Mounts to any Picatinny or Weaver mounting platform with custom locking bolts that slot seamlessly into your rail - guaranteed to hold zero against the toughest of recoil