READ THE ENTIRE AD. NO CODES. NO CHECKS. NO SHIPPERS. TEXT ONLY. CASH ONLY. TEXT ONLY WHEN YOU ARE READY TO LEAVE YOUR HOUSE. THEY ARE USED. if you have a garage door opener from a box store that is a liftmaster, chamberlain or craftsman and has the piece together tubes that are bowed, or your 8 foot door does not open all the way because you were sold a 7 foot box kit, then these rails are the perfect exchange. I have 1, 7 foot chain rail and 1, 8 foot chain rail.