... widely used for side seam,decorative seam etc BSL-3800 Series Single/double needle chainstitch sewing machine Feature:1.BSL-3800 ... seam,bedding,decorative thin material luggage,joint and shirts, trousers suture your sleeves,etc .2.BSL-3800 also can provide high ... , 6.4, 8, 9.5, 12.7mm options. BSL-3800 Series Single/double needle chainstitch sewing machine