Why choose ? Environment-friendly metals tube and tip. Soft Roll ink is the latest technology in ballpoint ink. A smooth writing experience. 5 pack for saving money. Product Features: Ballpoint pen refills provide you a smooth and quick writing, and will not leave dry spots. Product specifications： Product Name：D1/635 mini refill Size: 2.6'' (67mm) Color:Blue Material:environment-friendly metals tube and tip. Package: 5 pack Scope of application: for school, office, home, students and office workers use. Measure: each crystal pen refill is 7 cm(2.75 inches) in length and 0.7 mm core; Note: Please check the size before purchasing Quantity: Total of 5 pieces blue ballpoint pen refills. Enough quantity for you to use in your daily writing Material: these stylus pen refills' face are made of metal, durable and nice for you Features: Ballpoint pen refills provide you a smooth and quick writing, and will not leave dry spots Wide application: for school, office, home, students and office workers use