Description: Manufactured with a semi-solid core, 10mm solid oak lippings, and faced with a crown cut Oak veneer. The door has 2 vertical and 4 horizontal Oak V grooves, and is supplied lacquered with an open pore clear satin finish., Pre-Finished - ready to install, V Grooved Flush Design, 10-year manufacture guarantee, FSC Certified Dimensions Sizes available 1981 x 457mm x 35mm 1981 x 533mm x 35mm 1981 x 610mm x 35mm 1981 x 686mm x 35mm 1981 x 711mm x 35mm 1981 x 762mm x 35mm 1981 x 838mm x 35mm 2032 x 813mm x 35mm Technical information If a door needs to be trimmed it must be reduced equally from both sides. Each side of a door may be trimmed up to a maximum of 6mm for doors with a lipping 10mm or more, and 3mm for doors with a 6mm lipping. Please note any trimming over the 6mm overall for the fire doors will invalidate the FD30 rating. We recommend the use of 3 hinges to offer more rigidity and strength Untreated products must be fully sealed prior to hanging 'this applies to all surfaces including tops, bottoms and all recesses cut for hinges, locks, handles and letter plates etc. Waxes and oils are not considered suitable for sealing a door and if used will invalidate any guarantee should the door subsequently fail. Mendes ISEO Internal Oak Pre-Finished Door 813mm.