Direct-Drive 1 Needle Cylinder Arm Lockstitch Sewing Machine With Triple Transport And Vertical Hook Cylinder arm diameter 74 x 78 mm Big vertical hook (bobbin diameter 26 mm) Optionally with moving binder for perfect binding operations (binder set 5430 kit 559 708 009) Stitch type 301 Large clearance under the machine arm (350 x 130 mm) Max. stitch length 6 mm (On request 9 mm) Max. top-feed-stroke 9 mm Max. clearance under the sewing feet 20 mm Automatic top-feed-stroke adjustment Controlled needle thread tension Automatic adjustment of presser foot pressure Electric driven bobbin winder Electronic hand wheel Electronic back-tack lever Automatic thread cutter Integrated LED sewing light No compressed air