Med (1.0 mm). Fine (0.8 mm). Long lasting ink. World-renowned 4-color pen! Four color inks in one pen! Writes black, blue, red and green. Fun & colorful expression. Convenient way to organize copy. BIC Performance Policy (US and Canada): If you are not satisfied with the performance of this product, please return it to BIC and we will gladly replace it at no cost to you. www.bicworld.com. Fight For Your Write: To learn more, visit BICFightForYourWrite.com. Made in France.