3 1/4″ M1500 Series Double-Hung with Integral Face Flange – CAD Drawings CAD DRAWINGS Configuration Description DWG PDF 1500 Series Double-Hung with Integral Face Flange glmdev2025-07-18T10:13:43-04:00 Share this project on any of these platforms. FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestEmail