Triple block with anodized aluminum cheeks and delrin(tm) sheaves.  Works with 704-98 for a powerful 6:1 purchase. Delrin(tm) sheaves ensure low friction and high safe working load. Swivel head may be locked in place to eliminate line twist. Sheave Dia. 2 3/8" (60mm), Thickness 2-29/32" (74mm), Width 2-1/2"(64mm), Length 5-1/32" (128mm), Weight 14.3 oz (405g), Safe Working Load 2250 lbs (1020 kg), Maximum line diameter 1/2" (13mm), Pin Diameter 1/4" (6mm)