Aeromat Ball Chair Replacement Ball ONLY [does not include base]. . eplacement ball for Aeromat Ball Chairs - 49 cm for Aeromat Fit Chair(SKU 33400), Aeromat Stability Ball Chair (SKU 75050), Aeromat Ball Chair (SKU35939), Aeromat Adjustable Ball Chair (SKU 75002) - 42 cm for Aeromat DeluxeBall Chair (SKU 35955) - Made with phthalates-free PVC, free of latex - Pumpsold separately - Base sold separately - All other units and parts soldseparately - Not intended to use as a fitness ball