For your favorite pen: Keep using your favorite ballpoint pen with the practical refills from Online. The international standard large-capacity refills fit all common large-capacity ballpoint pen models. Long writing: Each refill has a writing length of approximately 7,500 meters, which equals 215 DIN A4 pages. Value pack: The set includes 6 refills in black ink, the classic pen color in a value pack! Standard format: Each refill features a high-quality metal casing and writes document-proof, tropical-proof, and water-resistant in medium line thickness with a stainless steel ball, certified to ISO 12757-2 G2. Online brand quality: Online is a German company established in 1991 and specializes in writing instruments, calligraphy sets, cases, and much more. 6 ballpoint pen refills in blue, black, red, G2 format medium thickness, compatible with Parker, Pelikan, Faber-Castell, etc., extremely high quality and durable, standard ballpoint pen refills.