The Unityem Bamboo Aluminium Ballpoint Pen ballpoint pen is made from recycled aluminium, which requires less energy than producing aluminium from raw materials. It also reduces the amount of waste in landfills and helps to conserve natural resources aiming to reduce greenhouse emissions. The push button is made of bamboo. Ink colour: Black. Writing length: 800 metres. Nib size: 1. 00 mm.