Liquid ink roller soft grip PV-171 Free ink roller, liquid ink conforms to ASTM D-4236 Tip: Stainless steel tip, both arrow tip and needle tip available Ball: 0.5mm/0.7mm/ Metal clip with Rubber grip take you good feeling of writing Ink color : Blue, black, red, green Proposed packing: 12pcs/dozen box, 864pcs/carton Advantage: Precise writing smooth to the last drop of ink at any angle, ideal for both office and students.