All new USA made quality filters for your oxygen concentrator!</br></br>Product Description</br></br>This filter kit will fit all models of Resmed S9 CPAP machines. Including     S9 VPAP ST-A    S9 VPAP ST    S9 Escape    S9 Elite    S9 Escape Auto    S9 AutoSet    S9 AutoSet for Her    S9 VPAP S    S9 VPAP Auto    S9 VPAP Adapt (With ASV) These filters are not OEM. Filters may change in appearance from photo but are guaranteed to fit. If you don't see what you need?? please contact us because WE DO HAVE IT!</br><br/>http://www.amazon.com/gp/product/B00EQ6654Y