Hengs Industries USA, LLC is a premier manufacturer supplier of quality recreational vehicle and marine products. Hengs Industries provide a diverse series of quality products ranging from vents to sealants to affordable furniture supplying distributors throughout the United States and Canada. Fan will move 3 to 4 times more air than a normal roof vent fan. Features a 3 speed fan with 2 speed reverse flow to allow air in or out of your RV. Installs easily and fits most 14" X 14" roof vents This unit will replace the screen on your current roof vent. The only tool required is a #2 Phillip's screw driver Type : Powered Opening Length (IN) : 14 Inch Width (IN) : 14 Inch Color : Smoke Lid With White Screen With Screen : Yes With Fan : Yes With Lid : Yes