KX3300 Slngle needle flatbed lockstitch top&bottom feed heavy duty sewing machine. The new type of top-bottom feed machine is with link lever to drivethe lower shaft,and designed with super needle bar stoke,so thargreatly enlarge the ability for sewing heavy/suooer heavy materials with prolonged arm to offer greater working space suitable for sewing leather products,suit-case,bags,canvas,seat-cushios,etc. KX618 *　 8mm Dp?7 #22 2500s.p.m. 35mm 6 13 33 28 370 580?254?30 KX3310 *　 8mm Dp?7 #20#23 2500s.p.m. 37mm 6 13 33 28 370 580?254?30