Aeron Chair 1B08Vm By Herman Miller: New Pneumatic Cylinder. Package Include: 1 x gas cylinder(chair not included.) Samhongsa was founded in 1971, is a professional production and sales of Cylinder for office chair. Samhongsa have advanced production equipment and testing equipment and improved management system. Samhongsa always insist on the operation idea of ?human-oriented, honesty first, lean management and excellence? Providing perfect quality and service for users and possess the good reputation. Samhongsa?s cylinder have acquired and through eight world standards certifications(Such as: BIFMA?LGA?TUV?SGS, ect.). Samhongsa have built a friendly, long-term with Herman Miller, Allsteel, Steelcase, HON, etc. world-renowned brands. Only For Aeron chair made between 1996-2012. Listing is for a brand new never used CLASS 4 WITH 400N, office chair seat height adjustment pneumatic gas lift cylinder. 6.0" stroke (seat travel from lowest to highest seatings). Exceeds ANSI/BIFMA5.1-2011 standards, based on the specs of this cylinder, it's load capacity is 350 pounds. Cylinder Diameter: 28mm (1.1") Column Diameter: 50mm (approx 2"). Cylinder for Size A, B and C Aeron Chair. offer 5 years replacement warranty. Only Available for Aeron chair made between 1996-2012.