Reusable Black Foam Filters for Puritan Bennett 418 Standard (5 Pack)Reusable Black Foam Filters by AG Industries are used in your CPAP machine to provide you with clean air during CPAP therapy.Compatible with the Puritan Bennett GoodKnight 418 Standard CPAP machineReusableColor: blackAvailable in packs of 5 filters eachMay be returned on warranty issues onlyManufacturer: AG Industries SKU: P645029 $9.95 Qty: Add to cart Ship toSelect countryUnited States of AmericaUnited States of AmericaUnited States of America *Other *Shipping MethodNameEstimated DeliveryPriceNo shipping optionsApply Custom wishlist OKAdd to wishlistAdd to compare listEmail a friendcpap filter, reusable cpap filter, Filters, Reusable Filters,foam filter,cpap filter