4inch-Caster-025 is a wheel caster, which is the shortcut of installing wheels on a hospital bed, or any objexct needed to be moved. This wheel caster has a wheel diameter of 100mm or 3.937" inch in inches. The wheel has a width of 30mm=1.181" inch. The overall height of the caster is 130mm or 5.118" inch. Top Plate is the method of installing the caster to your equipment, the dimensions are 93mm x 62mm with the holes distance of 45mm x 72mm. Rolling with a wheel core material of Thermoplastic Rubber and a Thermoplastic Rubber tire rolled over Double ball bearing. Bearing in mind that every caster wheel has the load capacity of 198 lb with a Rigid type. The temperature range is -40 to 180 F. Enjoy our 4inch-Caster-025, we wish all the best in your project.