8" x 3" Heavy Duty Rigid Caster - Green Polyurethane on Steel Wheel - 2,500 lbs Capacity Per Caster This listing is for a 8 inch diameter by 3 inch tread width Rigid Caster combined with a Green Polyurethane on Steel Wheels. These Casters are a Heavy Duty Series of Casters with a weight capacity of 2,500 lbs per caster. For more information please checkout our features and technical specifications. Features Heavy Duty Drop Forged Top Plate and Yoke Base Manufactured from 1045 Steel 3/8" Round Edge Steel Legs, Double Welded 3/4" Axle and Lock Nut Zinc Plated Finish Wheel Diameter: 8" Tread Width: 3" Wheel Type: Green Polyurethane on Steel Bearing Type: 1" Roller Bearing w/ 3/4" Spanner Bushing (Precision Bearings Available) Load Capacity: 2,500 lbs Overall Height: 10-1/8" Mounting Plate Size: 4-1/2" x 6-1/4" Bolt Hole Pattern: 2-7/16" x 4-15/16" to 3-3/8" x 5-1/4" Attaching Mounting Bolt Hole Size: 1/2"