Pure White Slim CPAP/BiPAP Hose Tubing (6-Foot) Package:4 Tubes The Side Cover fits over

The Side Cover fits over the slot where the humidifier chamber would usually be installed

Unfortunately tubing design hasn't always kept up

This Outlet Coupler Tubing Adapter is designed for use with all Z1 & Z2 Travel CPAP Machines

These long life "cleanable" water chambers are compatible with all H5i Heated Humidifiers

Pure White Slim CPAP/BiPAP Hose Tubing (6-Foot) Package:4 Tubes The Side Cover fits overThis slim 15 Millimeter CPAP BiPAP Tubing was originally designed for use with Philips Respironics DreamStation Series CPAP BiPAP machines; but it can also be used on any CPAP BiPAP machine that is compatible with "slim" style tubing.