1. All the High Temperature Filter adopt seamless welding,flame resistant, which solves the pinhole defect of more than 50um left by the original sewing filter bag. 2. All Air Filter inside the bag in proportion to the design of positioning air duct, to ensure the flow, shunt through the filter material, make full use of the filter material, effective filtration area of 100%. 3. The outer frame adopts metal, temperature resistance 400℃, flame resistance, special temperature and specifications can be customized according to customer requirements.