These are standard replacement filters for the ResMed Airsense 11 series of machines. We do not recommend washing these filters and they should be replaced every 3-6 months.
ResMed Airsense 11 Kit for Pilot 24 Lite CPAP Battery
$35.00
Respironics Bacteria Filter for CPAP Machines ( 1 Pack)
$12.00
ResMed Airsense 11 Standard Filters (5 Pack)
$18.00