Detailed Product Description Sewing MachineTS310 / TS311 Sewing Units are compatible with paper bags, weaving bag, cotton bag, etc. Topstar sewing units are equipped with either Ba Fang or New Long sewing head. Height, speed, stitching length are adjustable.TS310 with Japanese New Long sewing head, photoelectric switch and automatic sealing, folding, threadcutting device.TS311 with Ba Fang sewing ...