Imagine your office chair has no wheel caster, you would be carrying it right and left, install 42mm-Lock-Swivel-Caster-003 instead. This wheel caster has a wheel diameter of 42mm or 1.654" inch in inches. The thickness of the wheel is 42mm or 1.654" inch. The caster dimensions heightwise is 38mm/1.496" inch. Mounted via a that has the size of 34mm x 34mm and the holes distance of 129mm x 74mm. Low drag was achieved by a Nylon core on a Nylon tire spinning freely with a Roller bearing. Each caster will carry the load of 55 lb and is Swivel and Upper Locking type. Last and not least the temperature range = -40 to 180 F. Buy the 42mm-Lock-Swivel-Caster-003 now, just add the quantity to basket and click on Checkout.