Listing is for one (1) Service Caster Series #KP30 swivel caster with a 8" diameter by 2" wide polyurethane on aluminum wheel and a bolt on swivel lock capable of supporting 1,250 lbs. The Service Caster Series KP30 is ideal for material handling, carts, shop projects and industrial equipment. Featuring a Kingpinless hot forged ASTM1045 steel design that increases caster durability and integrity, the series KP30 eliminates problems associated with kingpin failure due to severe shock loading.