LPD\'s Georgian doors offer a particleboard core with a primed MDF face. They have 20mm lipping’s on each side, top and bottom (10mm oak + 10mm finger jointed laminated timber).LPD Oak Arnhem 1L Internal Door - 78in x 33in x 35mm (1981 x 838mm) is available to buy online at BSOLPD Doors are one of the biggest manufacturers of doors in the UK, boasting a huge range of Laminated Internal and external doors at great prices its easy to see why they are market leaders. Product Features Face Type - Pre-Finished OakDoor Style - Arnhem Internal OakGlazing Type - 1 Light Clear BevelledGuarantee - 10 Years