SET INCLUDES: Door Slab, thickness 1 9/16" Trims Jamb Hinges Passage Handle Door made of Composite wood with honeycomb and eco-veneer coating. Door is pre-drilled for the hardware and pre-attached to the frame. Minimal rough opening can be calculated: door width + 2"; door height + 1 1/2".Thickness of the door slab is 40 mm or 1 9/16". SOLID CORE Composite 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. SEALING GUM GERMAN COMPANY DEVENTER It has a special profile that allows to protect your home from dust, makes a cozy and quiet atmosphere around every day. On another side it allows you to save 35 % more heat and save up to 20% to the bill. SOUND ATTENUATION Door's 40mm thick Composite 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.