Material: 100% Polyester Sound-Absorbing Fiber Panel Dimension: 20x26x9mm Easy to Clean and Install Custom Sizing Available Sound Absorbtion: Intertek ISO354: 2003 NRC VALUE: 0.45 (no gap) up to 0.80 100% recyclable PET 5 Years Warranty Just attach it to the wall by sticking double-sided tape on the back during installation. There are many different colours, and you can arrange and mix them however you choose. Your pinboard's size and images can be customised. Hang photos, reminders, artwork, trophies, and more--there is always something to PIN! These circular pinboards are immediately ready for use and have a lovely felt-like look. These pinboards are incredibly adaptable for tiny kids, big kids, and adults alike, whether they're hanging over a desk or simply running down a wall! Fast Shi