The wheels on these casters have a non-marking thermoplastic rubber tread mounted on a polypropylene hub, and precision ball bearings that offer medium rolling resistance and quiet operation. The housing is made from high-grade nylon, with a square steel plate for mounting. Each has a foot-operated wheel brake.
The wheels are nominally 75mm (3") in diameter, and the overall height of each caster is 113mm (4 1/2"). The small plate is 4.2cm (1 5/8") square and the large plate is 6.5cm (2 1/2") square; they require #8 and #12 screws respectively (not included). Weight capacity is 75kg (165 lb).
Made in USA and France.