Mounting 4inch-Lock-Swivel-Caster-010 is the solution of making your project to move around by pushing. This wheel caster has a wheel diameter of 100mm or 3.937" inch in inches. The wheel has a width of 50mm=1.969" inch. The caster dimensions heightwise is 150mm/5.906" inch. Top Plate is the method of installing the caster to your equipment, the dimensions are 115mm x 100mm x 6mm with the holes distance of 72mm x 85mm. Low drag was achieved by a Cast Iron and Polyurethane core on a Cast Iron and Polyurethane tire spinning freely with a Roller bearing. Each caster will carry the load of 661 lb and is Swivel and Upper Locking type. Last and not least the temperature range = -40 to 180 F. Enjoy our 4inch-Lock-Swivel-Caster-010, we wish all the best in your project.