Imagine your office chair has no wheel caster, you would be carrying it right and left, install 2inch-Lock-Swivel-Caster-016 instead. Diameter of the caster wheel is a metric standard 50mm that is equal to 1.969" inch with imperial units. The wheel has a width of 50mm=1.969" inch. The Caster with the wheel from end to end is 48mm = 1.890" inch. Mounted via a that has the size of 34mm x 34mm and the holes distance of 129mm x 74mm. Rolling with a wheel core material of Nylon and a Nylon tire rolled over Roller bearing. Each caster will carry the load of 66 lb and is Swivel and Upper Locking type. Temperature range = -40 to 180 F. Buy the 2inch-Lock-Swivel-Caster-016 now, just add the quantity to basket and click on Checkout.