... leather sewing machine 2,chain stitch:12mm 3,sewing alibity:22mm 4,sewing speed:800r/min 1,YT180 leather sewing machine2,chain stitch:12mm3,sewing alibity:22mm4,sewing ... ), the GB6-180 can easily sew heavy materials with heavier thread.Speed of sewing800s/minShape of head736*270*590Length of needling ...