The suggestion box is made of good aluminum alloy material, complex process, and with fine workmanship. The box is well-designed, durable and practical, is simple to use, easy to install. It can be used as a mailbox, complain letter box, suggestion box. Features -Color:Silver -Material:Aluminum Alloy -Size:28.50X21.50X10.50cm/11.20X8.45X4.13in - Made from aluminum alloy, safe and long using life. Widely used for office, factory, work unit, etc. - The appearance design of the product is simple and generous, you can use it in many places. - Can effectively help keep the information of mail and complaint suggestion. - You can put many mails and letters what you need due to the large capacity. Though the box is lock, this is designed to prevent from fishing or stealing private message. - Mailboxes provide a very large capacity that can easily accommodate mail, letters, newspapers and even magazines. Package list: 1 x Letter Box