Product features: 1, & have spent Imported high strength polyester coated PTFE membrane filter material. 2, & have spent Small aperture distribution uniform filter with high efficiency. 3, & have spent Has good air permeability performance to run small resistance. 4, & have spent Smooth surface waterproof and oil proof performance is good. 5, & have spent Suitable for welding, cutting, grinding dust filter. 6, & have spent Filter area is 15 square meters description: 1, the above filter cartridge model configuration of model machine.