Each strand of tube casings is shirred on a tube to allow one-step loading of the casing directly on the sausage filling horn. This speeds up production. Tubing is just like art in itself before modernization tubing has been done manually by hands but after industrial revolution technology speed up process of tube casing and now lot of tubing machines are available in the market. But even till now on small scale business tubing has been done by hand. Size of tube is very important factor at the time of tube casing otherwise it will affect filling process and quality of the sausages also. Hear Below is a table through which we can show you which size of tube we used for every caliber.