It is composed of very fine fibers by non woven making and sintered in high temperature vacuum oven. It has better filtering precision and large dirt-capacity. Main features of sintered fiber felt are 3D net structure, high porosity, uniform pore size. Due to its unique structure and features, sintered fiber felt has better performance in permeability and durability than wire mesh, and better performance in heat resistance and pressure resistance than paper filter and filter cloth. Therefore, it is an ideal material for requirements of high precision, heat resistance and corrosion resistance.