Hehr 4404- Vent/Exit Window; Only Vent Screened; Radius Corners; Clamp Ring Mounted; Please call us for pricing, or you can use the fax form; Rough Hole Size, Wall Thickness, Glass Color; Frame Color are all needed; If you are replacing a Hehr window, you can order with a Hehr Part number which can be found on the inside frame of the window, you will need to take the window out of your application for that number. It is a long number with dashes. Windows are 3 weeks before leaves plant in Michigan