Bic® Z4® Roller Pen. Smooth Writing. Black Ink. 0.7 mm. Rubber grip. Visible ink supply. Bic performance policy(U.S. 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. Labels for Education® is a registered service mark of CSC Brands LP. All Rights Reserved. www.bicworld.com. ©2014 CSC Brands LP. ©MMXIV Bic USA Inc.