Mosquito Bat Expanded Mesh - Mosquito Bat Expanded Mesh is a type of Expanded Metal Mesh that is commonly used to make the surface of mosquito bats or mosquito swatters. It is made by stretching and slitting a thin sheet of metal, usually aluminum or stainless steel, into a diamond-shaped pattern with small gaps between each diamond. The resulting mesh is then coated with a non-conductive material, such as epoxy or PVC, to prevent electrical shock.