SARTODOORS Planum 2122 White Wood Double Bi-Fold Closet Doors with Frosted Glass SET INCLUDES: - 4 Doors Slabs - Tracks - Pivot Sets - Pivot Brackets - Converging Panel Aligers - Door Knobs - 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.