Check the listing for details. Universal Fit Inline Bacterial Viral Replacement Filter for CPAP & BIPAP 5 pcs. Color: Clear/Blue, Condition: New with box. Listed at 17.99 USD. Lot of 5 - Universal Inline Bacterial Viral Filter for CPAP & BIPAP Machines New This filter offers over 3 times the filter media compared to a round filter. This allows for better airflow and longer filter life. Will fit standard CPAP hoses. Just need connect the filter to cpap machine between the air outlet and your heated tubing or mask elbow. Compatible With Most Cpap Machines: Fit In-line filter for 22mm tubing machine and 25mm mask elbow. Brand New - Hospital Overstock. Each filter is individually wrapped and factory sealed. The filter measures basically 2-3/8" x 2-7/8" x 3-1/2" H. The opening sizes are: 7/8" (22mm) ID & 15/16" (25mm) OD25/32" (20mm) ID & 7/8" (22mm) ODThis filter is meant for single use. This filter should not be cleaned or washed. Should be replaced every 4 weeks or sooner if needed. Bin 501 & 502