This is a A-B1ABP50 PULLEY-PETZL-1 1/2"-ALUMINUM PN: B1ABP50Main Description As Following : A-B1ABP50 PULLEY-PETZL-1 1/2"-ALUMINUM P.N: B1ABP50 Maximum Rope Diameter: 1/2"Sheave Height: 1-1/2"Sheave Material: AluminumSide Plate: AluminumTensile: 7193 lbsType: BearingWeight: 6.6 oz.Working Load Limit: 719 lbs Crossed From: P50A PETZL AMERICA Found in Section & Models : Sunbelt - Arborist > Hardware, Petzl PULLEYS: (UNDEFINED) Associated Items : New Also This is An Aftermarket Product And : Maximum Rope Diameter: 1/2" Sheave Height: 1-1/2" Sheave Material: Aluminum Side Plate: Aluminum Tensile: 7193 lbs Type: Bearing Weight: 6.6 oz. Working Load Limit: 719 lbs