Filter systems are essential when purifying a substance, removing all unneeded particles. When a sample is poured into a filter, the desired liquid passes through the sieve and the other particles are contained separately. Marathon’s Filter Systems are quality products made of polyethersulfone, a material used to increase the flow of product. The MarathonLS filter systems have a filter support that allows for faster flow and an angled hose barb adapter to prevent the filter from leaning. The filter systems have molded graduation marks and membrane and pore size labeling.