The Four Seasons Hatch features 161 square centimetres of fixed ventilation - even when closed. This roof hatch complies with gas codes, and is totally waterproof during rain, with flaps in 'open' rain position. Four independently adjusted, flyscreened flaps secure breeze from any direction. Screens are easily removed for cleaning. The complete assembly is ready for installation into a 660mm x 660mm aperture. Available in cream or white, with option of either single or double glazed skylights.