7 Series Triple 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 Diameter 2-3/8" (60mm), Maximum Line 1/2"(13mm), Length 3-3/8"(86mm), Width 4-1/16" (104mm), Height 3-7/16" (87mm), Bearing height 2-5/16" (58mm), Fasteners (6) #10 RH, C/C 2-13/16" (72mm), Safe Working Load 1200 lbs (545kg), Weight 1 lb 8.4 oz (692g)