Material:The keychain is made of ABS plastic, wear-resistant and durable and very strong. UNIQUE DESIGN - The innovative design combined with brick shaped keyrings in different colors, give people a vivid and vibrant feeling. It is an ideal choice for key installation. EASY TO ORGANIZE - The keychain can be quickly installed and removed, and you can organize the keys neatly, saving space. QUANTITY & SIZE:We provide you with 16 different colors of building block keyring. Each keyring size is approx. 28 mm, the size of the building block is 30 x 15 x 10 mm. Multifunctional: the compact keychain has bright color, very suitable for wall decorations, backpacks, wallets and car trailers, and is an ideal key decoration tool.