Is your cpap tubing too short? This adapter is exactly what you need! This SWIVEL STYLE adapter would be placed between two pieces of cpap tubing to help you connect two tubes together, and make it longer! This specific adapter may be used to adapt the smaller diameter of CPAP hose to a larger hose. The dimensions of this adapter are22mm O.D. x 22mm I.D. x 15mm I.D.. If you are unsure of the size of your cpap hose, your provider should be able to tell you if this will work.