Description 2 colors for you to choose : Blue color or black color , they are great writhing stationery for office /school Black and blue ink refills provide smooth, water resistant, quick-drying performance, and extend the life of your favorite pen Applicability: The versatile ballpoint pen refill fits most ballpoint pens, as well as many others that utilize the same refill; suitable for office, school and home application. Free-flowing, smooth writing german ink with medium 2mm ballpoint tip. Original manufacturer quality with metal shaft. Before ordering, please unscrew your refill and compare it to the pictures here, and make sure it length measures is 4.56 inch/ 11.6 cm; refill is threaded and screws into place Specification: Material : Metal Length Approx .116mm/4.56inch Pen Point Diamater Approx .2mm Package Includes: Pack of 10 Pieces 0.2mm Ball Point Pen Refill(6 Pack) Note: 1. Please allow a slight color difference between the real item and the pictures due to the difference between monitors. 2. Please allow a slight measurement error. Hope for your kind understanding and have a nice shopping day!