Economical, long lasting caster can be used on everything from office chairs to portable equipment. 2" diameter wheels with a dual escalator raceway system balances the load evenly for smooth swiveling and effortless rolling. Weight rating: 75 lbs. per caster. Available in hard or soft wheels with a variety of hood and wheel options, including a step-on brake for added safety. Add a step -on brake for safety and convenience. (available on hard or soft wheels). 4 piece caster sets include 2 brake casters. Add "B2" to the model number. If 4 brake casters are required, add "B4" to the model number.