Shop Total Lock Casters with Polyolefin Wheels. These Total Locking Plate Casters come with double ball raceways for increased strength and maneuverability, cold-rolled heavy-duty gauge steel frame, and plated with a zinc finish for increased resistance to rust and corrosion. This is a high-quality caster made to last. The Top Plate we offer on this is an industry-standard 2-3/8" x 3-5/8" overall size. The Wheels are Polyolefin wheels. They will not leave streaks, non-marking, and non-marring. Polyolefin Wheels are black and provide excellent chemical resistance. The temperature range of Hard Rubber Wheels ranges from 180°F to -20°F and has a maximum weight capacity of 350 lbs per wheel, depending on the size ordered. Polyolefin wheels have high impact resistance, but casters and wheels should never be dropped from any height, especially while under load. The wheels have a solid one-piece design. These wheels are reliable, affordable, and fantastic, combined with this total locking swivel bracket, giving you a tremendous quality total locking caster meant for various applications and industries.