This is the replacement slim-style tube made specifically for the Z1 and Z2 CPAP machines. Measuring 6 feet in total length with a 15mm inner diameter, it’s narrower and lighter than standard tubing, designed to work exclusively with the compact setup of these travel-friendly devices.
The slimmer profile keeps things lightweight and flexible, which makes it easier to pack and move with—especially useful if you're traveling.
Note that this tube is shorter than a typical 6-foot hose and isn't compatible with other CPAP models.