Please check your caster specifications prior to order.
Friction ring stem is compatible with most - but not all - chairs and stools.

11 mm (1/3") diameter;
19mm (3/4") long.
(a.k.a., Reverse braking casters; Loaded brake casters; Braked-upon-charge casters, Resisting casters)
Reverse Braking Casters resist chair movement when weight is on the caster. Most often used for added safety on work stools (e.g., medical, drafting, factory and dental stools) that are higher than typical chairs.
Price is for one (1) caster. Order a quantity of five (5) casters for a typical 5-star chair base.
Specifications
- Caster body is made of high impact modified polyamide 6.
- 50 mm (1.96") wheel-diameter.
- Sturdy 135 lb. load capacity per caster.
- Soft non-marking, non-abrasive tread is safe on hardwood and tile floors.
- Full hood