4" x 1-1/4" High Temp Phenolic Wheel Swivel Caster - 250 lbs. Capacity4" x 1 1 4" High Temp. Phenolic Wheel Swivel Caster These High Temp Phenolic casters can be used for food service institutional environments. They are light to medium duty with the option of rigid or to swivel. The high temp phenolic wheel combines phenolic resin and macerated canvas, making it ideal for dry heat applications. It has exceptional resistance to oil, grease, and most acids, chemicals, and cleaning solutions. Tread & Core: Phenolic Resin