Our 1-3/8″ diameter ball style office chair adjustment knobs are made from black nylon plastic with a co-molded inch brass insert or steel stud. They are made in the USA from quality materials and will last for decades.
Available Thread Size
- 1/4-20 x 3/4″
Additional thread sizes are available by special order. Contact us via email or 1-800-286-5471 or 919-596-5555 or FAX to: 919-596-5559 for assistance in placing your order.
