Barrel is manufactured from corn derivative bioplastic. Bio-degrades in as little as 12 weeks depending on conditions. Environmentally friendly; reduces CO2 (Carbon Dioxide) emissions. High-quality design. Producing 5 million saves over 22000 gallons of oil. All pens are printed "81.9% biodegradable" in the same color above the pen grip. Price includes one color, one location Silk Screen imprint on barrel. Product Dimensions: 5-1/2" long.