Reusable Black Foam Filters for Puritan Bennett Knightstar 330

The Reusable Black Foam Filters for Puritan Bennett Knightstar 330 (1 Pack) is a package of one replacement, reusable filter for use with the following machine manufactured by Puritan Bennett: Knightstar 330 This is a package of one (1) foam filter and does not include any other components. Please Note: Images are not available for the machine using these filters. These machine is no longer in production with the manufacturer. General Tips Section Tips for inserting filters: 1. If you are using the disposable white filters, insert it into the filter area first, mesh-side facing in, towards the device. 2. Insert the gray foam filter into the filter area, on top of the fine filter. REU1018, REU1019