Heavy weight capability and Durability made the wheel casters like the VXB20050CPU3B a must use, get your do it yourself object move around. The wheel diameter is 50mm or 1.969" inch in inches. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 48mm/1.890" inch. Mounted via a Top Plate that has the size of 38mm x 38mm and the holes distance of 129mm x 74mm. Low drag was achieved by a Nylon and Polyvinyl Chloride core on a Nylon and Polyvinyl Chloride tire spinning freely with a Roller bearing. Bearing in mind that every caster wheel has the load capacity of 55 lb with a Swivel type. Environment temperature range is -40 to 180 F. Buy the VXB20050CPU3B now, just add the quantity to basket and click on Checkout.