Our cartridges are 100% made of high purity polypropylene resin, which is ideal for general particle reduction applications. It’s easy and safe to incinerate or dispose used cartridges. The cartridges are manufactured by a high-tech melt-blowing machine results in a consistent quality and graded pore structure. Its graded pore structure enhances dirt holding capacity and filtration efficiency. In addition, our filter cartridges are free of surfactants, binders and adhesives. It has an excellent advantage of non-fiber releasing, which indeed delivers superior performance.