... composite tubes,13-60mm in diameter,50-310mm in length,with different specification.Our annual output is 80 million pcs,which could ... tubes, 13-60mm in diameter, 50-310mm in length, with different specifications. Our products have got the certification of GMP and ... , medicine, food, chemicals and others.1. Product material: PE2. Specification: 13-60mm in diameter, 50-310mm in length3. Printing: offset ...