QUALITY: These wheels are made of precision molded polyurethane mechanically bonded to a polyolefin core. These wheels offer easy roll-ability, floor protection, non-marking and non-conductive performance. Our industrial wheels are ready for your heavy duty project. DUAL LOCKING BRAKE: The total locking brake locks both the caster wheel and the swivel. Rotate 360 degrees. Swivel caster wheels. Capacity: 900lbs each caster wheel. Swivel casters rotate 360 degrees which makes turning the mating equipment possible. It’s good for transporting furnitures and displays quietly and safely. CASTER SIZE: Overall Height: 7.7" (195mm). Plate Size: 4.5" (115mm) x 3.9" (100mm), Hole center to hole center: 3.3" (85mm) x 2.8" (72mm), Mounting hole dimensions: 0.74" (19mm) x 0.4" (10mm). CASTER WHEEL: Caster Wheel Diameter: 6" (152mm). Caster Wheel Width: 2" (50mm). Caster Wheel Material: Polyurethane on Polyolefin. Caster Wheel Color: Maroon. MULTITUDE OF APPLICATIONS: The wheels can be used for a different applications Including: Flight Cases, Instrument Cases, Display / Exhibition Equipment, Dollies, Tool Boxes, Light Machinery, Equipment Stands, Mobile Workstations, Speakers, Cabinets, Stands, Amps, Electrical Enclosures, Furniture etc.