... presetting length. The drafting is the optimal design. FA507 Spinning Frame.1. High quality :Able to produce excellent cops for ... construction is the optimal design ,can produce the best yarn with the lowest breakage.2. High efficiency :Narrow machine width ... ,456,444,420,408,396,384,372,360,96 Ring diameter(mm)38,42,45Tube length(mm) 205,230Spun ... fiber up to 65mm or their blends FA507 Spinning Frame