SARTODOORS Lucia 2466 White Wood Barn Bypass Doors with Clear Glass SET INCLUDES: - 2 Door Slabs - 2 steel rails 6.6FT each - Hangers with wheels - Door Stops - Floor Guide - Brackets - 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. 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.