Description: APPLICATION: The size of CPAP fully fits for ResMed S9 S10 CPAP machines, great replacement parts for your device. FILTER: Each filter is a combination of material engineered to block fine particles and large particulate matter, so you can breathe easy. HEALTH CARE: are designed so as to provide you and your loved ones with the cleanest air to maintain the health of your lungs and keep the potential diseases away from you. SUPER SAFE: are extremely safe. No smells either. Just beautifully designed that are extremely easy to change, replace or dispose of. GREAT VALUE PACK: Super convenient pack of 20 Ultrafine CPAP Air , just replace filter every 3-4 weeks to ensure a restless, sleep. Specification: Material: Fiber Color: White Size(LxW): About 5.3x3.5cm/2.09x1.38inch Suitable: For ResMed S9 S10 Quantity: 20pcs/pack Package includes: 20pcs x CPAP Fine Air Filter Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement.