These polycarbonate decorating tubes are unbreakable and do not lose their shape. They can be used with both nylon pastry bags as well as disposable pastry bags due to their large support roll. On account of their transparent nature, air bubbles can easily be spotted. 12 plain (numbers U1-U12), 10 scalloped (A6, A8, B6, B8, C6, C8, D6, D8, E6, E8). 1 #2 leaf and 1 tube for yule logs included.