Panther Colour Eco Range. Popular range of eco-friendly push-button promotional pens at great prices. One of our most popular ranges of coloured pens made from recycled plastic. Suitable for all events and promotions. Also available in Satin Silver. Generous print areas, barrels 40mm x 20mm, clips 20mm x 4mm for your messages. Priced to suit all budgets. Barrel prints are available on our Same Day Express Service.