Hoffman CWH5557, CONCEPT¢ Hinged Window Kit, Fits 550x570mmHoffman CWH5557 CONCEPT¢ Hinged Window Kit, Fits 550x570mm. Product Specifications BRANDHoffman® MANUFACTURERS PART NUMBERCWH5557 CONSTRUCTIONAluminum DESCRIPTIONFixed & Hinged Window Kits COLORPaint WINDOW SIZE M X N MM493 x 486 A X B X C MM550 x 570 x 38 WINDOW SIZE M X N (INCHES)19.40 x 19.13 WINDOW SIZE M X N INCHES19.40 x 19.13 WINDOW SIZE M X N (MM)493 x 486 A X B X C INCHES21.65 x 22.44 x 1.50 FITS550x570mm