Size: 6" x 2" Color: Red Style: Caster Condition: New Feature: 3/4" Roller Bearing with 1/2" ID Bushing (Manufacture will provide zerk fitting in the wheel or axle)Type: Swivel Casters w/ Top Lock Brake & Matching Rigid Casters Bearing: Roller Bearing Top Plate: 4" by 4-1/2" Bolt Pattern: 3" by 3" Overall Height: 7-1/2" Material: Heavy Duty Polyurethane on Steel Hub Capacity: 1200 lbs each Quantity: 1 - Set of 4 Part Number: 506PSB and 506PSR Installation Hardware: Not Included