These Traditional oak 4 Panel Internal doors, are supplied with a solid laminated core, to give you that stability and weighty feel. Supplied unfinished, with 20mm solid oak lippings, these doors must be decorated before hanging. Supplied in a range of standard sizes in both 35mm standard imperial, and 44mm thick FD30 Fire Door Options. The panels in these doors are a traditional raised and fielded design. These doors are supplied with 10mm solid oak lippings on the standard doors and 18mm lippings on the FD30 Options.