You need 2inch-Lock-Swivel-Caster-012 to have your office desk, equipment or even a machine to easily roll them around. This caster is rolled on a wheel that has 50mm diameter/1.969" inch inches. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 48mm = 1.890" inch. is the method of installing the caster to your equipment, the dimensions are 34mm x 34mm with the holes distance of 129mm x 74mm. The caster core is made of Nylon and has a Nylon tire with a low friction Roller bearing. Each caster will carry the load of 66 lb and is Swivel and Upper Locking type. The temperature range is -40 to 180 F. Enjoy our 2inch-Lock-Swivel-Caster-012, we wish all the best in your project.