If details are important, you’ll be delighted with Charter Oak® XL. These 16’8” panels are 40% longer than conventional siding panels. That means a cleaner, more attractive finished appearance with fewer overlaps. Made with the same durability, value and premium appearance, Charter Oak XL extends the quality reputation of one of the most trusted names in vinyl siding. Charter Oak XL’s extended panels can be used on their own or in combination with regular 12’1” panels. They deliver performance in remodeling and new construction alike, with all the durability and strength of Charter Oak® for faster, easier installation.