Check the listing for details. Pilot Dr. Grip Center of Gravity Ballpoint Ink Refills, Medium Point, 3 Packs. Condition: New. Listed at 10.73 USD. Pilot's high quality refills and accessories extend the life of Pilot products, creating ultimate value; an economic and environmentally-friendly option. Refill fits the following pens: Dr. Grip Center of Gravity, Axiom ball point, Dr. Grip Pure White, Dr. Grip FullBlack, Dr. Grip Frosted, Pilot MR Ball Point Tip Size: Medium Point 1.0mmAvailable in 2 colors: Black or BlueEach pack includes 2 refills. Sold as 3 packs. PILOT DR. GRIP: Designed with perfect weight distribution for comfortable, balanced writing, this ergonomic retractable ballpoint pen delivers an ultra-smooth writing experience.CENTER OF GRAVITY: Featuring a latex-free, wide double layer comfort grip & balanced gripping axis designed to help reduce writing stress, this ergonomic ballpoint pen delivers ultra-smooth writing.