PRE II is one of the best economical high purity filter cartridges available. Featuring a graded density matrix of all polypropylene fibers, it provides consistent filtration for the wide variety of fluids. Continuous fiber matrix prevents media migration and ensures consistent production yield and overall quality function performance. Fixed pore structure provides efficiency integrity and optimum particle retention. No surfactants or binders are contained, which are to interrupt product quality or cause foaming and thermally bonded non-woven fiber constructions provide superior filtration and often eliminate the need for circulation to achieve product clarity.