3/8" x 1/2" - large diameter (100FT / ROLL) - Large Diameter Plastic Mouth Piece/Vinyl Tubing. A plastic mouth piece that fits on the end of fat straight pipes (10mm diameter) and bowl/bubble pipes. Each participant should use their own pipe with tubing. Prevents burns/blistering to lips, cuts from the pipe and the transmission of certain blood borne pathogens such as Hep B, HepC and HIV. Should be cut into various lengths as per client personal preference.