plastic ball pen 1.EN71 & ASTM 2.Smooth writing 3.Suitable for promotion and gift 4.Material :Brass&Aluminium 5.Refill:Metal roller Size:135x12.4mm Packing:500pcs/ctn Meas:0.018cbm G.W.:18kgs ball pen, pen, plastic pen, ball pen set, pen set, office pen