This an unused and complete CPAP mask assembly from Resmed, but will work with about every CPAP made as the air hoses are interchangeable between different makers. It consists of the complete mask assembly with everything needed, the frame, headpiece, four (4) pillows, and elbow. Just plug your CPAP’s hose into it. The price is about half that on Amazon and no tax. Pillows are washable and four should last you at least a year.