4" x 2" Sirius HD Donut Polyurethane on Aluminum Wheel - 2 Swivel & 2 Fixed Casters - Plate Size: 4" x 4-1/2" - Capacity: 4,000 lbs per Set

4" x 2" Orange Sirius Heavy Duty Donut Polyurethane on Aluminum Wheel - 2 Swivel Caster 2 Fixed Caster Set of 4 - Plate Size: 4" x 4-1/2" - Capacity: 4,000 lbs Per Set of 4 Plate Size: 4" x 4-1/2" CasterHQ's 4" x 2" Sirius HD Poly on Aluminum Wheels are used in many applications where the casters and wheels are exposed to water or chemicals. Aluminum is resistant to rust and provides a very strong core for the liquid cast polyurethane tread. Polyurethane on Aluminum wheels is used in Food Processing Equipment, Food services, Hospitals, Research Labor