Door made of solid pine wood with honeycomb and eco-veneer coating. Door is not pre-drilled for the hardware.Thickness of the door slab is 40 mm or 1 9/16". SOLID CORE Solid wood with honeycomb core made by laminated wood with honeycomb using Ciplex technology. CIPLEX by SARTO High-end film layer that is applied on top of the laminated wood with honeycomb 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 with honeycomb construction yields 30% noise reduction over standard doors. CONSTRUCTION Door is manufactured from a single piece of wood with honeycomb and will give several generations of normal usage with minimal care.