... for side seam,decorative seam etc BSL-3800 Series Single/double needle chainstitch sewing machine Feature:1. ... BSL-3800 is suitalbe for jeans side seam,bedding, ... shirts, trousers suture your sleeves,etc .2.BSL-3800 also can provide high efficiency and stability with ... , 8, 9.5, 12.7mm options. BSL-3800 Series Single/double needle chainstitch sewing machine