TheJanssens Side Push Open Tilt Window can be added to any Royal Victorian or Junior Victorian Greenhouse kit at the time of order. It is hinged at the top and opens with a handle at the bottom. These come in black or fir green. The tilt window features a glass panel and an extra glass piece for underneath the window for Royal Victorian or Junior Victorian Greenhouse. All standard Royal and Junior Victorian Greenhouses already include one louver window. You can add as many of these push out windows as you want to your greenhouse with the caveat that you cannot put windows adjacent to each other - so "every other panel" would be the most you can add. Auto-openers and fly screens are available. FEATURES Color: Standard: Black or Fir Green are normally in stock (short lead time) Special Order: White and Bronze (long lead time) - other colors available, call 888-648-5333 to order. Frame Material: Aluminum Manual Operation Available optional automatic opener Available options fly screen Made in Belgium by Janssens 15 Year Limited Warranty Financing Available WARRANTY 15 Year Limited Warranty