Product material: food grade PE. Perfect for decorating cake, cupcakes, cookies, candy, fondants, pies that requires a variety of creams, frostings or fillings and without bursting. Strong enough to hold stiff things and easy enough to squeeze. Tips, coupler and clips not included. The pastry bag design with ergonomic ,Non-slip design is easy to hold with your hands while squeezing icing . These bags make for the perfect gift for any budding or professional baker. For new bakers, this set it large enough to get through the learning curve.