Product Info Catalog Building Materials Windows Screen Accessories 5/16 x 13/16 x 72-Inch Mill Finish Side & Top Window Frame 5/16 x 13/16 x 72-Inch Mill Finish Side & Top Window Frame Request a Quote UPC: 49793159687 Manufacturer: Prime Line Products SKU: 123626 Model Number: PL 15968 5/16" x 13/16" x 72", Mill Finish, Side & Top Window Frame, For Triple Track Window Frames, Drop In Style.