This is a 30cm ruler made by WOOD KIDS, with wood samples. It's designed so you can see the grain of various tree species at a glance, including beech, camphor, kaya, cherry, horse chestnut, zelkova, maple, hornbeam, oak, cedar, and cypress. Recommended for display or as a reference for choosing wood. Although unused, please be aware of minor scratches and scuffs from long-term storage. Comes with a box. Please consider this item, which allows you to feel the warmth of wood.