PREMIUM DESIGN: Made of high quality flexible polymers, 6-foot Premium Universal CPAP Tubing delivers uniform breathing between your CPAP mask and device. COMPATIBLE: Universal CPAP Tubing is compatible with , , , and most CPAP, BiPAP and BiLevel device . LONG-LASTING SEAL: 19mm is equipped with standard 22mm Premium Rubber on both ends, designed to a long-lasting seal and air leaks. OPTIMAL FLOW: With unrestricted interior walls and premium rubber , it delivers maximum flexibility, uninterrupted air flow, and promotes easy cleaning. MOBILITY AND COMFORT: 6-foot in length, it provides ample distance and hose flexibility to increase head and body mobility in bed, and CPAP mask leaks. color:As shown Material:Silicone+Plastic size:Length 1.8m, diameter 22mm Package Contents: 1 x Ventilator tube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.