Wholesale Spiral Paper Tube 聽 Air spinning is one of the effective spinning methods. Air spinning has high speed, large roll, wide adaptability, simple mechanism, and no spindle, steel ring, and traveler, which can double the output of spun yarn. Air-spun paper tubes. Inner diameter of large mouth: 50mm, inner diameter of small mouth: 39mm, height: 170mm. Weight: 60-80 grams. It adopts...