Single block with aluminum cheeks, ball bearing sheave and becket. Delrin(tm) ball bearing sheave ensures low-friction operation. Removable becket allows pre-spliced lines to be easily attached. Sheave Dia. 2" (51mm), Thickness 15/16" (24mm), Width 2 1/8" (54mm), Length 5 17/32" (140mm), SWL 1500 lbs. (680kg), Weight 5.7oz. (162g), Max Line 7/16" (11mm)