Black Hawk, ensures that every Flush door that comes out from its most modern manufacturing plant is made with seasoned timber and selected premium veneer. The process starts with chemically treated and seasoned battens framed to the Block Board Core and bonded with Phenol formaldehyde synthetic resin under high temperature and pressure, under cross-band process. This unique process makes Black Hawk Flush Doors dimensionally stable and ready to use. Doors Available in following thickness: 25 30/32 35 38/40mm 45 mm.