Phenolic caster wheels are composed of phenolic resin material that is backed by macerated fabrics with a dense consistency throughout. These wheels endure impact well and are also resistant to grease, oil and most other chemicals. Our phenolic wheels are manufactured here in the USA and come standard with heavy duty, all metal roller bearings. Our swivel phenolic casters feature double ball bearing raceways on rigs and all rigs are operable from -40 to 180ºF. These phenolic casters are proudly assembled in the USA.