Real oak veneered internal door and large recessed flat panel. Prepared for varnish finish Recommended Door Oil / Varnish. Pre-finished fire doors are available to order. Fire door options are available on all doors in this range as a discretionary safety upgrade. This door benefits from a solid core construction allowing it to be one of the sturdiest options available. Rebated door pairs can be ordered for standard stock doors (not fire doors) with a short lead time. A matching bi-fold door is also available.