The CMI RP105 Hi-Roller Pulley features stainless steel sideplates, 3" aluminum sheave, bushing, and stainless-steel axle. 

Specifications:

• Sheave Diameter: 3"
• Max Rope Diameter 5/8"
• Body Material: Stainless Steel
• Sheave Mechanics: Oilite Bronze Bushing
• Sheave Material: Aluminum
• MBS: 16,000 lbs
• SWL: 3200 lbs
• Width: 4.25"
• Height: 6.50"
• Depth: 1.044" (sideplate to sideplate)