4" Gray Rubber Swivel Caster, Plate Mount
These casters feature a soft gray rubber wheel molded to a polypropylene hub with an oil-less bearing. They are excellent for institutional applications because they are extremely quiet, will not mar floors and provide excellent control and safety with the double-lock feature (stops both roll and swivel). They are also low maintenance and have a tread design which offers good traction on wet floors. These 4" swivel casters have a 4" x 3-3/8" plate and 150 lbs. capacity.