... 66,80 inches 4.single head, one system type LT868A-28 LT868A-32 LT868A-40 LT868A-52 ... 66,80 inches knitting speed Controlled by frequency conversion to adjust speed,6 grade speed ,Max.Speed: ... 1.2m/sec( speed can change according to the needles, yarns, fabric and other condition)color ... .controled by DC electric machine, 4 grade to adjust.transmission mode frequency control, synchronous belt ...