PROFESSIONAL SILICONE PASTRY BAGS: Compared with others,ELK's piping bags uses the 60HA elastic silicone, which is the perfect material for the piping tips set. The slight elasticity ensures its reusability, allowing the viscous liquids to flow smoothly inside. It wont blow out even if you knead the thick batter with it. Its high stretchiness means that all of the squeezing efforts you make gets transferred to bulging sides as it stretches out, instead of forcing the frosting out the bottom. SAY GOODBYE TO COLORED RESIDUESThe smooth interior of the piping set makes the frosting fall off easily after being cleaned with warm water. It is really a good choice when you make cupcakes, biscuits, and bread with bright-colored frosting, which wont cause colored residues like other cheap pastry bag. You just need to turn the inside out, cleaning it with warm soapy water. The non-slip exterior that has a slight texture allows you to hold it more comfortably, easy to use as well. PIPING TIPS FOR EASILY SWITCHING: The converters will not be edged out during the extrusion process, and the icing bags tips can be easily switched without hollowing out the icing or replacing the piping bag. This is definitely helpful for different patterns of cake decoration. The cake decorating supplies includes:2 pastry bags and 6 stainless steel icing tips,2 standard converters,2 silicone rings. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Manufacturer warranty will not apply. Please review Amazons return policy, which usually offers free returns within 30 days of receipt. Learn more about Amazon Global Store.