With a load capacity of 220 lbs., 25% greater than its standard PlasTech models, this swivel caster is available in three twin-wheel models, each with a wheel diameter of 4 in. PlasTech casters are designed for hospital and medical equipment, and other applications requiring dependable performance combined with design style. Featuring soft, streamlined contours, PlasTech casters are constructed of high-performance thermoplastics and feature a labyrinth assembly to protect the axis and bearing against the ingress of dirt, moisture, and other contaminants. The series includes one low-profile swivel model (4-1/8 in.) and two standard-height swivel models (4-3/4 in.).