Matfer Polycarbonate Interchangeable Pastry Tubes, Set Of Ten Thanks to its outstanding cutting edge design, the Matfer interchangeable tubes guaranties a perfect decoration. No more oiling and drying The two included couplers give you the opportunity to work in a meticulous project User friendly and safe The Matfer interchangeable tips won't wear away rust or loose their original shape, they are made in a polycarbonate composite