Oajen 2" 50mm heavy duty chair caster for office chair, pack of 5, 110 lbs capacity per caster, 7/16" x 7/8" or 11mm x 22mm grip ring stem 2" caster with 7/16" x 7/8" grip ring stem. Heavy duty rated 110 lbs per caster. Hard wheel for carpet use. Exceeds BIFMA quality. 5 casters / pack. Made in Taiwan.