ABS Material--These mailbox numbers are made of ABS chrome-plated plastic, which is environmentally friendly, durable, corrosion-resistant, and waterproof, and can be used even on rainy days. Galvanizing and 3D Appearance--The surface of these numbers is smooth and beautiful after the metal galvanizing process. And the angled surface and retro bronze color make the number look very beautiful and elegant. Self-Adhesive Design--These numbers have a self-adhesive design. The bottom adhesion is strong, which can easily attach the numbers to the position you want. Wide Range of Applications--These numbers can be applied not only to most smooth, clean, and dry surfaces, such as mailboxes, crafts, house doors, offices, streets, but also in classrooms, apartments, hotel rooms, and hospitals as marks or signs, and the same applies to DIY decoration. Package Contents--This package contains ten numbers from 0 to 9, you can combine and install them as you wish, which is very convenient to use.