Flyshop 10mm Threaded Stem 2 Inch Dia Twin Wheel Furniture Swivel Caster 5pcs Maximum Weight Rating: 22lb / wheel,110 lbs as a set of 5 M10 (10mm) Threaded Stem 2 Inch Dia 5pcs Office Chair Nylon Swivel Caster Easy pull and snap installation 360 Degree Rotation Type