Synocare Cpap/bipap tubing is medical grade hosepipe meant to be used with all kinds of cpap machines or bipap machines and is compatible with all kinds of cpap mask, bipap mask or cpap nasal mask available in market in the brands like Resmed, philipsps, BMC, Devilbiss etc. The tubing is grey in color and the lenght is standard 1.8 meter or 6 feet long. The type is smooth bore with outer diameter of 22 mm. It can be safely used by patient with bipap machine for bipap machine for home suffering for sleep apnea. It can be used along cpap machine as well.