Slit lengthwise to pad railings, brackets, etc. Closed Cell Tubing has a slip resistant outer layer and is dishwasher safe. Comes in pack of 6. The tubing is 30cm long and can be cut to the required length. First measurement is outside diameter and second measurement is inner diameter i.e. for the 22mm/6mm Red: 22mm is around the outside, 6mm is around the inside opening.