Heavy Duty Plastic Wheel Rigid Brake Caster

5" x 2" Heavy Duty Plastic Wheel Rigid Brake Caster with 5" x 5-1/2" Top Plate - 500 Lbs Capacity. Polyolefin is a durable type of plastic that yields a high shock load, they are also impervious to water, washable, & highly resistant to chemicals, cleaning solutions, solvents, oils, & grease.