Diameter varies between 8 - 15cm -making it suitable for all species of hamster! 
Each tube is a natural, unique piece. Size ranges are approximate, and shapes will vary.
This bark is harvested sustainably without harming the trees, making it an environmentally responsible choice for your setup.
Cork bark is a natural material, so no two pieces are the same. The product photos are provided for illustrative purposes only. Your item may differ in shape - but I have shared a few different shapes! 
We recommend baking it before introducing it to your enclosure for 20 minutes on Gas Mark 4 / 180°C / 350°F.