This clip is threaded onto the headgear strap and attaches the strap to the frame. These clips work with the following masks:ComfortGel Nasal Nasal Mask ComfortGel Blue Nasal Mask ComfortFusion Nasal Mask ComfortSelect Nasal Mask ComfortFull 2 Full Face Mask ComfortGel Full Face Mask

We are authorized to sell and ship Philips Respironics products to end-users residing in the United States and having a valid US physician's order\prescription.Philips Respironics recommends that new patients purchase their devices, masks and initial accessories from a homecare company that can provide an individualized patient equipment set-up, clinical and after-sales support, and a program to assist patients with therapy success.We are authorized to sell and ship ResMed products to end-users residing in the United States and having a valid US physician's order\prescription. No 3rd party or B2B transactions permitted.Some images supplied by ResMed and used with permision. 2010 ResMedAll services provided by our company, including advertisement, ordering, sale, delivery, instruction, and setup of the products, are performed solely by our company and independently of the manufacturer.