Bold Black Reflective Mailbox or House Number - 5 - Size 4" (select - size (2"- 6") and digit (0-9) below) - Thick, Die-cut Exterior Grade Gasket-like PVC - not Metal or Rigid Plastic Stick to brick, stucco, wood and more Heavy Duty Adhesive, No nails or screws to rust 1/16" or 1/8" White (most reflective), Gold or Black (least reflective) Reflective Material Slightly Flexible, Thick, Reflective PVC (not rigid plastic) Don't Crack In Extreme Weather Like Rigid Plastic Can