4" Polyurethane Swivel Caster, Plate Mount
These heavyweight casters feature a thick polyurethane wheel molded to a polypropylene ceter with a roller bearing. These casters feature crowned wheels for easy turning, high corrosion resistant wheels, added load cushioning, high weight capacities with good floor protection and come in a swivel design. These 4" casters have a 4-1/2" x 4" plate and 550 lbs. capacity.