These extended cantilever mounts have all the same features as the Precision Matched Rings and are designed for mounting scopes with a forward location, providing correct eye relief and head placement. machined with certified USA 7075 T6 billet aluminum and held to an extremely tight tolerance of .0005 inches using a precision CNC mill. These Vortex rings are then serialized, vibratory tumbled, bead blasted and finished with Type III hard coat anodize. With the 20 MOA cant these Extended Cantilever 35mm mounts are designed for long range precision without compromise. Specifications Ring Diamter: 35mm Optic Center Height: 1.574\