Halifax or Vancouver our Low priced answert to the heavy weight objects movement, Wheel casters like our VXB20050NYG will be rolling your machine or equipment back and forth. Dia. Measured of the caster wheel in metric standard 50mm which is equal to 1.969" inch with imperial units. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 48mm = 1.890" inch. is the method of installing the caster to your equipment, dimensions are 34mm x 34mm with the holes distance of 129mm x 74mm. This caster wheel core made of Nylon and has a Nylon tire spinning over Roller bearing. Each caster wheel will carry the load of 66 lb and is Swivel type. The caster wheel temperature range = -40 to 180 F. Buy the VXB20050NYG now, we ship on the same day.