This 5" x 2" Polyolefin Kingpin Swivel Caster is 100% launderable and immensely resistant to organic dissolvents, oil, grease, nearly all chemicals, acids, and cleaning solutions. It displays weight capacities of 100 to 900 pounds per wheel, the 70 Shore D polyolefin wheel is a strong injection-formed wheel that is lightweight and economically-friendly. Polyolefin wheels also display an operating temperature scope of -40° F to +180° F.