52pcs cpap filter kit for philips respironics dreamstation, includes 22 pollen filters, 22 ultra-fine filters and 4 assembled filters, cpap filters replacement supplies, reusable assembly filter kit medihealer <b>attention:</b><br> <b> this is an assembly filter kit. please assemble filter into frame.</b><br> <b> please note the reusable filter may not hold firmly to the disposable fine filter for your machine, but to ensure optimal performance, the filters can be held together when installed into the machine.</b><br><br> <b>we provide two versions in one set</b><br> <b>about foam version</b><br> * to block large particulate matter.<br> * dense which can better block more dust and etc..<br><br> <b>about ultra fine version</b><br> * to block fine particles.<br> * denser compressed which can achieve better filtration effect.<br><br> <b>disclaimer</b><br> <b>this kit is a generic product manufactured and supplied by medihealer!</b><br>