This 6" x 2" thermoplastic rubber (TPR) heavy duty ergonomic swivel caster with flat tread and tread brake provide smooth and quiet operation, and are safe for all floor types. Our 48 Series casters are ergonomically designed for ease of movement and quiet mobility. The sealed precision swivel bearing is maintenance-free and significantly reduces push/pull force, keeping equipment operations safer while improving efficiency. Rig is zinc-plated for an attractive, corrosion-resistant finish.