Acrylic Material: The letter wall sticker is crafted from acrylic, which has crystal-clear transparency, resistance, and hardness. It is not as fragile as glass, has smooth edges, and is not easy to scratch your hands. No drilling required: Will not damage the surface being applied to. First, peel off the protective film from the back of the acrylic wall decal and attach the adhesive-free side of the sponge to the acrylic wall decal. Next, remove the protective film from the back of the sponge. Finally, firmly press the letters onto a clean, dry surface. For optimal adhesion, ensure the surface is free of dust and debris. Wide Application: 3D alphabet wall stickers are suitable for any flat and smooth surface, such as windows, walls and ceramics, etc. The unique design of the alphabet wall stickers allows you to DIY decorate every place in your home, which can make your interior space look bright and add more warm and sweet atmosphere. Warm Tip: Because it is strong and difficult to remove or reposition after sticking, please make sure it is in the right place and clean, flat, and dry the surface thoroughly before sticking. Size: 16.3 x 18 x 0.8cm / 6.42 x 7.09 x 0.31 inch (W*L*Thick) Material: Acrylic Color: Black Package Content: 1 x Self-Adhesive House Number