Stand up 7 series swivel block with Stainless Steel cheeks. Delrin(tm) sheave ensures smooth operation and high safe working load. Stainless Steel base spreads loads. Spring keeps block upright when not in use. Backing plate #97-49 sold separately. Sheave Dia. 2-2/8" (60 mm), Max Line 1/2" (13 mm), Dia. includes urethane base 3-3/8" (86 mm), Height 4-25/32" (120 mm), H2 2-15/32" (63 mm), Fastener Size (4),1/4" RH (6 mm), C/C 1-11/16" (43 mm), SWL 2250 lbs (1020 kg), Weight Stain. 14.5 oz. (411 g)