Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you! ABS Material--These mailbox numbers are made of ABS electroplated plastic, which is environmentally friendly, durable, corrosion resistant and waterproof, and can be used even in rainy days. Electroplating & 3D Appearance--These figures surface is smooth and beautiful after the metal electroplating process. And the angular surface and retro bronze color make the number look very beautiful and elegant. Self-Adhesive Design--These numbers adopt a self-adhesive design. The bottom adhesion is strong, which can easily stick the numbers to the position you want. Wide Application--These numbers can be applied not only to most smooth, clean and dry surfaces, such as mailboxes, handicrafts, house doors, offices, streets, but also to classrooms, apartments, hotel rooms and hospitals as marks or signs, and the same applies for DIY decoration. Package Content--This package includes ten numbers from 0 to 9, you can combine and install it as you want, which is very convenient to use.