The premdor walnut 2 stile veneer match internal fd30 fire door has a solid core and is finished with a lacquered walnut veneer so it is ready to hang this door features a modern cross grain effect and as this door is veneered matched for consistency of grain pattern and colour between each and every doorthis door provides 30 minutes of fire protection when hung in accordance with the manufacturers instructions in an appropriate frame with intumescent strips in the jambs and head or top and