As for pastry bag, Tianbai can make 12inch, 14inch, 18inch, 21inch and etc, according to your demands. And different material we can handle, like LDPE, HDPE and biodegradable. Here below is more features, 

• Thick Piping Bags. Made of durable, anti-burst, non-slip and food grade plastic that is flexible, strong, reliable and thick enough to bear pressure of squeezing and frosting without any burst or leakage.
• Work with and without Any Tip or Coupler. Just cut the narrow end of piping bag according to the size of coupler or tip. Tianbai pastry bags offer good fit with all sizes of coupler and tips, giving you freedom to create flowers, stars, and unique patterns on cake whether you use tips or not.
• Efficient Grip. No matter how much you squeeze, Tianbai Icing piping bags have smooth exterior that gives you firm, workable grip that do not slip off hands and a super smooth interior that let icing flow freely and smoothly.

More information you could mail to inquiry@chnpack.com