30 PREMIUM CPAP HYPOALLERGENIC FILTERS - Designed to capture fine particles of dust, allergens, and pollen to help keep your CPAP machine and breathing experience clean and healthy. THE PERFECT FIT - Compatible with most CPAP machines, including S9 series, AirSense, AirCurve, and AirStart series CPAP and BiPAP devices. SUPER SAFE AND EASY TO USE - Made from high-quality, hypoallergenic materials. Free from Bisphenol-A. These filters provide reliable performance without chemical odors. Simple to install, replace, and dispose of. GREAT VALUE PACK - Save time and money by purchasing in bulk. Avoid the hassle of running out of filters. This pack of 30 ultra-fine CPAP air filters ensures you always have a fresh filter ready when needed. EASY USE - Fits most models. Replace every 3-4 weeks for optimal performance and cleaner airflow. Color: White Material: Filter sponge Size: 5.3 x 3.5 cm Package Contents: 20 x Filters Note: Lighting and monitor settings may cause slight color variations. Measurement error allowed is +/- 1-3 cm.