Matfer Bourgeat Polycarbonate Icing Tips, Cake Decorating Tip Set, 24PK Clear 166003 They can be used with both nylon pastry bags as well as disposable pastry bags due to their large support roll. The Matfer polycarbonate decorating tubes are unbreakable and do not lose their shape. On account of their transparent nature, air bubbles can easily be spotted. Set Of 24 Decorating Tips - Polycarbonate: 12 plain (numbers U1-U12). 10 scalloped (A6, A8, B6, B8, C6, C8, D6, D8, E6, E8). 1 #2 leaf.