The Heng's 9" x 9" Mini Roof Vent is light-weight and ideal for providing fresh air in small places such as bathrooms, passageways, galleys, etc. Model # 18511-C1G is Polar White in color, made from strong, durable plastic, and comes with a built-in screen and ceiling garnish. The vent opens and closes by way of a manual t-style crank knob. Note: a vent installation kit is NOT included.