To block even the smallest of particles, the KnightStar 320 Foam Filter is made of polyurethane foam.
Designed for the Puritan Bennett Knightstar 320 CPAP Machine, the foam filter is washable and reusable and should be changed every six months.
The Reusable Black Foam Filters for Puritan Bennett Knightstar 320 (All Versions) (1 Pack) is a package of one replacement, reusable air filter for use with the following machine manufactured by Puritan Bennett:
This is a package of one (1) foam air filter and does not include any other components.
Please Note: Images are not available for the machine using these filters. The manufacturer no longer produces this machine, so availability of this product will eventually end.