Polypropylene sediment filter 2.5"x20",50pcs/case HIGH CLASS MATERIAI - Global Aqua's melt blown, high density, polypropylene filter is designed to filter and remove most damaging particles and sediments to protect. HIGH COMPATABILITY - Designed to fit all standard filter housings, our Sediment Filter makes replacing your filters a snap. A great fit for all! LONG LASTING - With its airtight packaging you won't have to worry about your carbon filters going to waste.