Imagine your office chair has no wheel caster, you would be carrying it right and left, install 6inch-Swivel-Caster-006 instead. This caster is rolled on a wheel that has 150mm diameter/5.906" inch inches. Dimensions of the caster wheel is 50mm (1.969" inch). The Caster with the wheel from end to end is 190mm = 7.480" inch. This wheel caster can be mounted using a Top Plate with the dimensions of 115mm x 110mm x 6mm and holes distance of 72mm x 85mm. Rolling with a wheel core material of Polyamide (Nylon) and a Polyamide (Nylon) tire rolled over Double ball beaing. Each caster will carry the load of 1543 lb and is Swivel type. Last and not least the temperature range = -40 to 180 F. Buy the 6inch-Swivel-Caster-006 now, just add the quantity to basket and click on Checkout.