The Authentic Bronze Collection was inspired by the rugged beauty of the American outdoors, and is made of 100% solid bronze, with rock solid craftsmanship. The applied bronze patina finish is designed to wear off slowly over time and this will further enhance the beauty of the letter slot, by exposing the natural shades of the oxidizing bronze. This is a living finish. Easy to install, each number has 2 pre-drilled holes, and comes with 2 brown painted screws to match. The Solid Dark Bronze House Numbers come in a choice of two sizes: * 4" Bronze House Numbers ($20.00/ea. digit) * 6" Bronze House Numbers ($28.00/ea. digit)