5400 Cylinder arm diameter 50 mm Optionally with moving binder for perfect binding operations(binder set 5400 kit 558 153 006) 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