The Horizon Mountain 3D Wall Art Piece. Where the earth meets the sky. Capture this moment we all enjoy with our line art style take on it! Installation in two easy steps: 1. Peel 2. Stick About our products: Material: 1/4" PVC (smooth finish, black in color, sturdy yet flexible) Style: Looks amazing on plain light walls, and tonal paints. The product sits flush against the wall (suitable for indoor use).