Twin-wheel casters perform better on uneven surfaces than single-wheel casters. The wheels on this caster have non-marking, high-quality thermoplastic rubber treads mounted on a polypropylene hub with precision ball bearings that offer medium rolling resistance and quiet operation.
The 2mm thick zinc-plated steel base has a double ball-bearing swivel head attached to a 60mm (2 3/8") square fitting plate. A foot-operated brake simultaneously locks the swivelling and rolling features. Four #12 screws required (not included).
The small caster is 50mm in diameter by 70mm high (2" × 2 3/4") and holds 80kg (176 lb); the large size is 75mm × 102mm (3" × 4") and holds 100kg (220 lb).
Made in Germany.