THE ADJUSTMENT - Great news: For your peace of mind, the filter size fully fits most machines, including all S9 series, AirSense AirCurve, and AirStart and BiPAP series. 30 PREMIUM HYPOALLERGENIC FILTERS: Designed to block the smallest particles of , and pollen to keep YOU and your machine healthier deep breathing cooler. SUPER SAFE AND EASY TO USE: filter beyond filtering harmful mini contaminants. MADE QUALITY MATERIALS, our hypoallergenic filters are extremely and do not contain bisphenol-A. You breathe more easily than ever without risking exposing lungs to any type of allergy. Neither chemicals. Only beautifully designed filters that are extremely easy to , replace or dispose of. EASY USE: Fits most machines, just replace the filter 3-4 weeks to healthy and sleep., Manufacturer: YUMIN