Nature Line Ball Pen with Push-button Mechanism. Barrel Made of Bamboo, with Accessories in Wheat Straw, Promoting the Use of Natural Raw Materials & Reducing Pollutant Emissions. with Blue Ink Refill & Available in a Wide Range of Colours. Wheat Straw Logo at the Top of the Ball Pen. Colours: Black, Red, Natural, Pale Green, Blue. Minimum Quantity: 1000.