Halifax or Vancouver our Low priced answert to the heavy weight objects movement, Wheel casters like our VXB005150YGVCB1 will be rolling your machine or equipment back and forth. Wheel dia. is 150mm or 5.906" inch in inches. Sizes of the caster wheel is 50mm (1.969" inch). The Caster with the wheel from end to end is 195mm = 7.677" inch. This wheel mounting is Top Plate with the dimensions of 100mm x 115mm and holes distance of 75mm x 85mm. The weehl core material is Polypropylene core and Polyurethane and has a Polypropylene core and Polyurethane tire with a low friction Double ball beaing. Each caster wheel will carry the load of 617 lb and is Swivel and Center Brake type. The caster wheel temperature range = -40 to 180 F. FYI, you will need to buy the VXB005150YGVCB1 in order to get one :).