Minimization of possible untoward effects on operator by installing VXB20050NYG just ask your operator to push and pull, but not carry. And rolling on wheel that has 50mm diameter/1.969" inch. The thickness of the wheel is 50mm or 1.969" inch. Overall height of the wheel caster is 48mm = 1.890" inch. Mounted via a that has the size of 34mm x 34mm and the holes distance of 129mm x 74mm. Low drag was achieved by a Nylon core on a Nylon tire spinning freely with a Roller bearing. Maximum load calpacity that should not be exceeded on each wheel, remember to add safety factor, when calculating the load capacity 66 lb with a Swivel type. Environment temperature range is -40 to 180 F. Buy the VXB20050NYG now, just add the quantity to basket and click on Checkout.