5 Series Double Over the Top Block. Stainless Steel cage and base provide a solid platform for clean leads. Delrin(tm) ball bearing sheaves ensure low-friction and high safe working loads.Sheave Dia. 2" (51 mm), Max line 7/16" (11 mm), L 2-7/8" (73 mm), W 2-3/4" (76 mm), H 2-15/16" (74 mm), Bearing Height 2" (51 mm), Fastners (6), #10 RH (5 mm), C/C 2-5/16" (59 mm), SWL 1000 lbs. (450 kg), Weight 12.6 oz. (357 g)