The "Door Left PRO665 / 825" is a replacement part designed for Napoleon's Prestige PRO 665 and Prestige PRO 825 gas grills. This door is a crucial component of the grill's construction and is typically used to access storage or other areas within the grill. If you need to replace a damaged or worn-out left door on your Prestige PRO 665 or 825 gas grill, you can purchase this replacement part and install it to restore the functionality and appearance of your grill. Make sure to follow the manufacturer's instructions for proper installation and safety. Replacing grill parts like doors can help extend the life of your grill and ensure it continues to perform at its best.