SET INCLUDES: 2 Door Slabs Steel track rail 13FT Hangers with wheels Wall Attachments & Spacers Floor Guide Anti-Jump pins Installation Manual Screws for hardware Doors are No Pre-drilled!Thickness of the door slab is 40 mm or 1 9/16". SOLID CORE Solid wood core made by laminated wood using Ciplex technology. CIPLEX by SARTO High-end film layer that is applied on top of the laminated wood Made in Italy. NO FORMALDEHYDE Environmentally friendly using only latest eco-friendly materials. Company requires use of only the safest materials. We care about our planet, the environment and you and your loved ones. Sarto Doors are Ideal for use in hospitals and childcare centers. SOUND ATTENUATION Door's 40mm thick solid wood construction yields 30% noise reduction over standard doors. CONSTRUCTION Door is manufactured from a single piece of wood and will give several generations of normal usage with minimal care.