Pilot Ballpoint Pen Refill 0.5mm Extra Fine BRFN-10EF-B [Black, 20 pieces] The outer box of the ballpoint pen is not included. 1900■ Oil-based ballpoint pen (Acro Ink) refill 0.5mm Extra Fine Black Product Features: Oil-based ballpoint pen (Acro Ink) refill. 0.5mm Extra Fine Black. Main applicable products include Dr. Grip G-Spec, ballpoint pens priced from 1,000 to 2,000 yen. Product Specifications: Manufacturer: Pilot Brand: Pilot (PILOT) Ink Color: Black Ink Type: Oil-based Acro Ink Ball Diameter: 0.5mm Shaft Diameter: 6.0mm (10EF) Model Number: BRFN-10EF-B Dimensions: Maximum diameter φ6.0mm, total length 86.8mm Length: 86.8mm Contents: 1 piece