The ICON Technologies Boler Window is a polycarbonate window replacement for Boler units. Due to the variance in original Boler dimension and radius, this window is oversized and rectangular. The product must be trimmed to fit your opening. Includes 12-1/2' of locking gasket for the complete installation of either the front or rear window. To Trim: Use the existing window as a template and mark the size and radius on the window film with a marker. If the original window is not available, use cardboard to create a template of your Boler window opening. Using a fine-toothed saw (jigsaw, band saw, circular saw, etc.) carefully cut along the template line. Boler Window measures 43-3/8" x 19-1/8". Includes 12-1/2' of locking gasket for installation of either front or rear window Boler Window measures 43-3/8"" x 19-1/8"" | Icon Technologies Boler Window with Locking Gasket