Find the 43BDVT (Serial# D21A0 / SB D21B0 / SB) Majestic Gas Direct Vent Fireplace in the diagram listings shown below. Each diagram will take you direct to the 43BDVT (Serial# D21A0 / SB D21B0 / SB) Majestic Gas Direct Vent Fireplace repair part listings and part views for your model.