These are Orange Single Wheel Swivel Casters with Brake and a white core. They are a transparent colorful soft polyvinyl chloride (PVC) tread and white polypropylene (PP) core. They have metal wheel supporters with a loading capacity of approximately 80 pounds. Please email me with any questions. SKA64-OB
Approximate Measurements: Mounting Plate; 2-3/8" Square, 1-3/4" Hole Distance - Wheel; 2-1/2" Diameter, 7/8" Width - Overall Length of Caster 3-3/8"
