Swivel Pulley Block, Designed For Fibrous Rope, Rope Dia. 1/2 In., Working Load Limit 1650 lb., Sheave Outside Dia. 2 In., Sheave Width 21/32 In., Bearing Type Plain, Mounting Hole Dia. 15/32 In., Block Material 316 Stainless Steel, Sheave Material Acetal, Finish Painted, Includes Shackle