The Door Assembly Stainless Steel 18 By 36 Diamond Plated with Lock and Hinge is a practical and durable product made of diamond plated aluminum. It is available in smooth aluminum or diamond plated aluminum, offering versatility to suit different preferences. Each door assembly comes with a lock and hinge, providing added security and convenience. With continual-seam weldments, this product virtually eliminates moisture trapping, cracking, and fatigue, ensuring long-lasting performance. Designed to fit most 18-inch x 18-inch x 36-inch underbody box makes and models, this door assembly is a reliable choice for various applications.