This Ballpoint Pen Refill 1 mm 2-pack provides 1 mm point, 2-pack for reliable everyday writing and refill replacement. It is suited for Knight and helps extend the life of compatible pens or markers. A dependable choice for office, school, reception, home office and commercial stationery supplies, Refills for Dr. Grip COG & Frosted, MR1, MR3 Ballpoint pens. Medium point. 1.0 mm. Package of 2.