HDM Z1 Polyester Air Filters For CPAP Machine,Air Filters,20/Pack,HD60-3021Price: USD131.98 HDM Z1 Polyester Air Filters For CPAP Machine can be used with all HDM Z1 Travel CPAP machine. It need to be replaced after every 30 days. Keeping a fresh filter will ensure that the user receive air which is correctly purified this will help maintain high quality therapy. Other products from H e a l t h P r o d u c t s F o r Y o u |