Minimization of possible untoward effects on operator by installing VXB20050ALB just ask your operator to push and pull, but not carry. Diameter size of the caster wheel has a metric standard 51mm which is equal to 2.008" inch with imperial units. The thickness of the wheel is 51mm or 2.008" inch. The caster dimensions heightwise is 257mm/10.118" inch. Top Plate is the method of installing the caster to your equipment, here are the dimensions 47mm x 47mm with the holes distance of 129mm x 74mm. The Roller bearing design will enable the Acrylonitrile Butadiene Styrene (Plastic) tire to roll easily with a core made of Acrylonitrile Butadiene Styrene (Plastic). Each caster will carry the load of 77 lb and is Swivel and Upper Brake type. Temperature range is -40 to 180 F. Buy the VXB20050ALB now, just add the quantity to basket and click on Checkout.