... , etc.With powerful unison feed, the machine can sew accurately and easily several sheets of heavy weight materials piled up together.The ... high as 20mm, suitable for stitching the extra heavy-weight materials.The machine is provided with a free space measuring 420mm wide ... .19 CBM TY441 Long-Arm, Cylinder-Bed, Unison-Feed, Extra Heavy Duty, Lockstitch Sewing Machine