Monteverde Capless Gel to fit Waterman Ballpoint Pens - Black Standard size Waterman ballpoint refill by Monteverde Convert your ballpoint pen into a Capless Rollerball High quality metal parts with Stainless steel tip and Fine Point & Gel Ink Length: 4.42 inch (112.20mm) Nib Size: Fine (0.6mm) Refill Reads: Monteverde USA Capless Gel - W42