About Product:This paragraph pen appearance design simplicity fashion, deeply mass favorite; 0.5mm senior titanium ball head, super hard wear, easily damaged; can guarantee each support pen not leak ink, and not leak oil, and writing smooth; imitation artificial learn design of anti-sliding quality soft grip, should not be oxidation, and feel comfortable, continued writing not fatigue; special pigment ink, and color bright, and handwriting clear, and resistance water resistance light, easily faded, for archive using. Small 12/combined, 144, 1728 in//piece, a PCs.