This Unique German Ball Pen Consists of at Least 90% Cellulose Acetate, a Renewable, Bio-Based Material. the Plunger is Optionally Available in Clear Transparent Abs Plastic or Cellulose Acetate. Due to the Nature of the Material There May be Colour Variations of the Barrel & Clip. the Pen is Equipped with a Replaceable Quality Jogger Refill. Minimum Quantities Apply.