Service Caster .845 inch diameter x 2 inch long zinc plated grip ring stem. Fits Series #20 1/2 inch bolt hole casters.
Grip ring stem designed to fit 1/2" bolt hole casters. Friction-ring stem casters fit into a hole and use a spring ring to secure themselves, making them easy to install and replace. Ideal for office chairs and tables, they allow smooth 360 degree movement with minimal tools. Please ensure that you have measured the stem size correctly. If you are uncertain about the measurements, call us or message us for any questions.