Prime-Line PL 14323 Window "C" Sash Corner, White Plastic, White Plastic (2-pack)0) Plastic sash frame corners designed to fit into square-cut ends of universal aluminum "C" sash frame material to repair or construct new frames. Square-cut assembly eliminates the need for miter cutting providing for an easier frame construction by the homeowner. These corners are designed for use with Prime-Lineft.s aluminum sash frame material which is constructed with pre-installed vinyl seals and factory installed pile weather-stripping. These components are used for constructing sash frames with single strength glass, double strength glass, or acrylic sheet material. Features Plastic construction White plastic For use with 5/16 In. x 11/16 In. universal -Inc.-in sash aluminum frame material Used for constructing sash frames with single strength glass, double strength glass, or acrylic sheet material USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.