Stand-Up Swivel, Aluminum cheeks 303-62Stand up swivel block with aluminum cheeks. Delrin(tm) sheave ensures smooth operation and high safe working load. Backing plate ordered separately # 97 60. Sheave Dia. 1 7 16" (37 mm), Max Line 7 16" (11 mm), Dia. includes urethane base 2" (51 mm), Height 3 17 32" (89 mm), H2 2 5 32" (55 mm), Fastener Size (3), #10 RH (5 mm), C C 1 1 31" (26 mm), SWL 1000lbs (450 kg), Weight Alum. 3. 1 oz. (89 g)