3-1/4" x 2" Phenolic Wheel Swivel Caster with 3/4" Threaded Stem - 600 Lbs Capacity3 1 4" x 2" PHENOLIC WHEEL SWIVEL CASTER WITH 3 4" THREADED STEM Part #: 7RTP032PHN Specifications: Phenolic wheels are a great alternative to steel wheels. Phenolic wheels give you similar capacities to steel wheels, however, they provide better floor protection, slightly quieter rolling, do not rust, & are more economically priced. Phenolic wheels are made using phenolic resin mixed with macerated canvas which yields a high capacity and high impact