Pen test pen TM00135 pen 2B pencil stationery

classic square pen body, simple shape, high strength resin lead core, is not easy to break. Machine read recognition rate stability in 100%, the authority of certification. According to the machine reading card square size, refill develops square, so you can apply once in the answer time saving, go. Each pen is equipped with two lead core, so that you with the "core". Human engineering design, better grasp! Students must have .