Stainless steel sideplates, two 1 1/2" stainless steel sheaves, ball bearings, and stainless steel axle. Max Speed = 90 ft/sec or 60 MPH. Weight: 0.75 lbs|MBS: 14,000 lbs (62kN)|Rope Capacity: 1/2"|Side Plates: Stainless Steel|Mechanics: Bearing|Sheave: 1.5" Steel|Axle: Stainless Steel|Size (in): 3x5|MBS: 14000 lbs|ROPE CAP: 1/2"|SIDE PLATES: Stainless|MECHANICS: Bearing|WEIGHT: .75 lbs