Imagine your office chair has no wheel caster, you would be carrying it right and left, install 3inch-Lock-Swivel-Caster-022 instead. This caster is rolled on a wheel that has 75mm diameter/2.953" inch inches. The wheel has a width of 30mm=1.181" inch. The Caster with the wheel from end to end is 105mm = 4.134" 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. The Double ball bearing design will enable the Polypropylene tire to roll easily with a core made of Polypropylene. Bearing in mind that every caster wheel has the load capacity of 176 lb with a Swivel and Upper Locking type. Temperature range = -40 to 180 F. Enjoy our 3inch-Lock-Swivel-Caster-022, we wish all the best in your project.