Feature XASR-3041 X-ACCU 30mm Adjustable Elevation Picatinny Scope Rings A Adjustable Elevation Height from 32 to 38mm (1.26-1.50") for Bullet Drop Compensation A Optimized Ring Height Fits 30mm Tube Scopes With Up to 56mm Objective Lenses A CNC-Machined Construction Ensures Precise Scope Alignment for Reliable Performance A Six-Screw Per Ring Picatinny Mount Keeps Scope Secure for a Stable, Consistent Hold Specification XASR-3041 X-ACCU 30mm Adjustable Elevation Picatinny Scope Rings Specification Details Ring Dia: 30 mm / 1.2 in Height: 54 mm / 2.13 in (Default) Central Height: 32-38 mm / 1.26-1.5 in (Bottom to Center) Length: 26 mm / 1.02 in Material: 6061-T6 Aluminum Alloy Weight: 70 g / 2.47 oz Mount: Picatinny Finish: Black Matte Items in the Package: 2.0mm Hex Key, T15 Torx Key, T20 Torx Key, etc. Size