Double Stainless Steel Block 705-25Double block with Stainless Steel cheeks. Works with 705 35 for a 4: 1 purchase. Delrin(tm) sheaves enable smooth operation with high safe working loads. Swivel head may be locked in place to eliminate twists. Sheave Dia. 2 3 8" (60mm), Thickness 2" (51mm), Width 2 1 2" (64mm), Length 5 27 32" (148mm), SWL 2250 lbs. (1020kg), Weight 12. 4oz (352g), Max Line 1 2" (13mm)