ADVANCED HIGH EFFICIENCY REUSABLE CPAP FILTERS FOR DREAM STATION 1: Our advanced CPAP filters for the Dream 1 Station CPAP machine offers advanced filtration against pollen, dust, and other particulates and debris. Each CPAP filter cleans the air to a high level prior to delivering it to your airways. OPTI-FIT FILTERS FOR DREAM STATION 1: replacement CPAP high efficiency filters use Opti-fit filtration and are optimized for an fit and performance for Dream Station 1 CPAP machine filters. Our line of CPAP filters for Dream Station 1 CPAP machines delivers performance equivalent to the for 1 CPAP filters. SIMPLE TO INSTALL CPAP Filters for Dream Station 1: To use for 1 CPAP replacement filters, align the ultra-fine filter channels with the reusable filter. Gently all edges together for a secure seal. Slide the combined CPAP filters into the designated slot. BETTER AIR QUALITY CPAP FILTERS FOR DREAM STATION 1 CPAP MACHINE: With the filters in place, your CPAP machine can deliver healthier air quality into your airway for for Dream Station 1 CPAP Machine. VALUE PACK CPAP FILTERS FOR DREAM STATION 1: Our for for 1 CPAP filters come in of 27 high-efficiency filters in a single purchase. Color: Dark Blue Material: plastic Package Contents: 18 x Ultrafines 9 x Reusable Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.