Compatibility: Work with all Standard 22mm Diameter Tubing Two Brush Sizes: 1. The 7 Feet Tube Brush is designed for scrub and clean the insides of Standard 22MM Tubing. (Not for heated hose with a 90 degree fitting at one end.) 2. The 7 Inches Brush is handy for cleaning smaller staffs, such as difficult to reach areas on humidification tank or mask or small tube. Instrcution for Use: 1. Put the round handle of brush into the tube first, pull out the handle from the other end of the tube. Use a mild detergent and warm water for cleansing the tube. 2. Keep the tube as straight as possible and gently work the brush in a back and forth motion, in short strokes, gradually working further inside the tube. 3. Rinse the hose with cool water after cleaning. Warm Tips: 1. Avoid agitating too hard when using the brush. 2. Keep the brush clean and dry when not in use. 3. It is recommend to clean your tubing with brush every morning, and replace your tube every 2 to 4 months. Supplied by Medihealer.?SATISFACTION GUARANTEE - Your satisfaction is our highest priority. If you have any questions or concerns, please let us know without hesitation and and we will either correct the situation or provide a refund replacement immediately. ?MAINTAIN EQUIPMENT'S LONGEVITY- Protecting this investment will lead to additional years of efficient use of your machine, which can save your money in the long term through preventative measures. ?THROUGH CLEANING FOR HEALTHIER LIFE - Our cleaning brush are designed to keep your tube clean and provide you and your loved ones with the cleanest air to keep you healthier. ?SAFE EFFECTIVE - The Tube Brush's sturdy metal stem lets you gently and thoroughly clean the otherwise virtually unreachable interiors of tubes. The soft nylon bristles fit perfectly to clean without scratching or damaging tubing. Supplied by Medihealer?. ?ECONOMICAL SET - Including 3 brushes. The 7 Feet Tube Brush is designed for scrub and clean the insides of Standard 22MM Hoses. (Not for heated hose with a 90 degree fitting at one end.) The 7 Inches Brush is handy for cleaning smaller staffs, such as difficult to reach areas on humidification tank or mask or small tube.