Compatibility: Standard 22mm Tubing with Rubber Cuffs - End Caps will fit snugly into the Rubber Cuffs, and Tubing will snap into the Tubing Bridge channels when hanging to soak or dry Slim 15mm Tubing with Rubber Cuffs - End Caps will fit snugly into the Rubber Cuffs; however, because Slim Tubing is thinner than Standard Tubing it will NOT snap properly into the Tubing Bridge. Tubing can still be hung over the bridge to dry but it may not hang properly to soak. Heated 22mm Tubing - In most cases Heated Tubing has specialized connectors at the "machine end" and standard connectors at the "mask end." End Caps will NOT fit the specialized connector end, but will generally fit the standard connector end. Heated 22mm Tubing should snap properly into the Tubing Bridge channels when hanging to soak or dry. Heated Slim 15mm Tubing - In most cases Heated Tubing has specialized connectors at the "machine end" and standard connectors at the "mask end." End Caps will NOT fit the specialized connector end, but will generally fit the standard connector end. Heated 15mm Tubing will NOT snap properly into the Tubing Bridge. Tubing can still be hung over the bridge to dry but it may not hang properly to soak. Easy tube cleaning in three steps Use the End Caps to secure a cleaning solution inside of the tube. Hang the hose to SOAK. Take off the End Caps, flip the tube to DRY, while hanging from your chosen surface. Package include: 1Pcs CPAP Tube Cleaning Holder Notes: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!