Ships from Hong Kong. These house numbers are made of brass. Brass color room numbers are easy to read. These 3D hardware letters are 3 mm thick and 1.96 inches tall. Display your address with the stylish brass numbers and brass letters. These door numbers and letters can be used for personal or business mailboxes. Place them on your apartment doors, condo boxes, P.O. Box, personal mailbox & post system, and your commercial wall mount boxes. The brass letters are with thin top coating, but friction and collision from the hard object or product themselves could damage the items. Please take care of it. Decorative Accessories/Decorative Signs. House Numbers. Address Plaques, House Signs.