Fiddle block with v-jam and becket works with 02-43 for a strong 4:1 purchase. Delrin(tm) sheaves run on plain bearings for high static loads. Sheave Dia. 1-1/16" (27mm), Thickness 15/32" (15mm), Width 2-5/32" (55mm), Length 4-7/8" (124mm), SWL 900 lbs, Weight 3 oz. (85g), Max Line 5/16" (8mm)