Architrave 5020 Call For Quote $3.54 Interior Door and Window Architrave Medium Density Fiberboard: 1-3/16″ x 5-1/4″ View Product Catalog Architrave 5020 quantity Add to list Want a discount? Become a member. SKU: 5020 Category: Mouldings Description Description Architrave: a one piece door and window header trim. Can be used in place of the traditional 3-piece build up of Lintel, Header board and Parting Bead. MDF5020 – Medium Density Fiberboard Available in 16′ lengths. OWS does NOT recommend installing MDF in areas prone to moisture (bathrooms, basements) Other sizes and styles available by special order.