Bio-Write Retractable Gel Pens are made from 35 percent bio-based & corn-based bio-resin & 27 percent pre-consumer recycled plastic by pen weight. Bio-based pen reduces use of petroleum & reduces chemical residue in landfills. Medium point (0.7mm) delivers bold vivid lines with exceptionally smooth ink flow. Gel ink is acid-free to help preserve documents. Grip color indicates the ink color. Translucent barrel allows monitoring of the ink supply. Latex-free rubber grip protects against allergic reactions & provides added writing comfort. Gel pen is refillable. Product packaging contains 100 percent recycled material & 35 percent post-consumer material.