Before purchasing our mantels, make sure that your fireplace will not transfer a lot of heat onto the mantel. Excessive heat will ruin the shelf. Use a mantel protector or heat reflector to keep the mantel from getting too hot. All shelves are handmade in New York, USA NO VENTLESS FIRPLACE * No visible screws or supports; * Package includes instructions, mounting bracket; * Mounting system has a built in bubble level system, helping you to put the shelve to wall as straight as 180 degrees; * Mounting system is made from multiply plywood and hardwood; * Custom sizes available from 12" - 96" long and 6" - 12" wide is available. This will cost extra depending on your needs, but in most cases the price is calculated with adding the next closest bigger size to your custom size; *up to 200 degrees temperature resistant We send the order out 10 business days from your order.