Colon tubes are a hard to find item that you can purchase here at Enema Supply.com. We sell colon tubes in a number of different sizes.
This particular colon tube is 20 inches long and has a diameter of 26 French. French is a unit of measure. 36 French would be larger, 18 French would be smaller. The 26 French Colon Tube features a side slit for a deeper and more thorough cleanse.