J & L Welding and Machine is proud to offer a window speak-thru made from solid aluminum. Our speak-thru devices come with an air filter, face plate, backing plate, cork gaskets, and stainless steel screws. Installation of our window speak-thru is easy, fast, and efficient. The air filter fits snugly in the speak-thru grill so people can speak and hear each other with ease. Our speak-thru devices are made from solid aluminum right here in the USA.