Skilcraft U.S. Government Ballpoint Pen Refill - fits Skilcraft U.S. Government Pens P-3967, P-7135, P-7136, P-2833 and P-1604, P-1618 Black Ink, Fine Point 3 Pack Package of 3 - Ink Refills - Ball Point Black Fine Point Fits SKILCRAFT U.S. Government Pen...Recycled ball Point Models P-3967...P-7135...P-7136...P-2833...P-1604...P-1618.