Two caps per base provide twice the clamping power. 210deg coverage provides even clamping pressure that pulls scope into base, prevents scope from rotating when tightening caps. Aluminum construction keeps weight to a minimum. Mfg: Weaver SPECS: Aluminum, gloss black, matte black, or natural silver finish. Height from top of base to bottom of ring:Medium – .160" (4mm). High – .328"(8.3mm). Standard and Extension (Ext) rings fit Weaver-style bases. Extension sets include one standard ring and one extension ring. Others
