Respironics Smooth-bore Tubing 6" ft Gray, Reusable, Flexible.
Gray Respironics tubing is 6-Feet long with a smooth bore -- to help reduce noise levels -- and long lasting medical grade rubber endcaps for a secure seal. It is heavier that Respironics white Premium tubing and has a slightly darker gray color.
This tubing is elusively for use with the following:
Aria LX, M Series sleep systems, REMstar Pro 2, BiPAP Pro, Duet LX, REMstar Auto, REMstar Plus, and REMstar Pro.