Description Overview Mattress quilt and flange fabric may be sewn up together and overlocked simultaneously. Suitable for sewing a variety of fabric of different textures. Features Double air cylinder. Five threads. Adjustable presser foot pressure. Stepless speed regulation. Specifications Maximum sewing thickness: 50 mm (2). Sewing width: 20 mm to 25 mm (0.78 in to 1). Presser foot lift height: 15 mm (0.60). Stitch: 0 to 6 mm (adjustable). Maximum sewing speed: 5000 rpm. Upper feed belt available: yes. Needle bar type: double bar.