The system will accommodate any standard 1-3/4 inch thick wood door. Custom doors are made to order, factory machined for hardware i.e., locks hinges flush-bolts. Factory machining allows doors to arrive at the job site prepped and ready for installation, saving time, ensuring quality and accuracy, eliminating the need to coordinate machining, and saving labor costs. Particle Board Core, FSC Certified Particle Board Core or Kraft Paper Honeycomb core construction. Door skins are comprised of cross bands of a minimum thickness of 1/16" and face veneers of various foreign or domestic species or high pressure decorative laminates. Factory Finishing for the best possible result, smoother, more durable and uniform color, texture, and sheen, factory finished doors offer the ultimate in quality, environmental consideration, and economical results.