Disposable CPAP filters for all the Puritan Bennett Goodknight 420 Series CPAP machines, including the 420G, 420S, and 420E, and the Puritan Bennett. Goodknight 425 and 425ST Bi-level machines. Two CPAP filters per package.
cpapusa.com compatible filters are of the same material and quality as the OEM filters.
Ultrafine Filter 1 3/4" x 3/4" (45mm x 19mm)
Pack of 2 Nellcor Puritan Bennett #M-413950-04 for GoodKnight 420G/S/A and 425
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