Pool Filter Replaces Unicel C-8350, Pleatco PVT50W, Filber FC-3053 Media Area 50 sq ft, 8 1/2" OD, Open Hole: 1 9/10" Top, Open Hole: 2 3/8" Bottom, 7 1/4" Long, AK-7003 1 Year Warranty - Baleen Filters are made from Durable and Efficient USA Made Reemay Fabric - Washable Fabric Extends Your Filter's Life 50 sq. ft. 8000 Series Cartridge for DM Industries, Vita Filter, replacement of Unicel C-8350, Pleatco PVT50W Baleen Filters Top: Open Hole: 1 9/10" Bottom: Open Hole: 2 3/8" Guaranteed Perfect Fit - Extremely Durable - Wash & Reuse - Most Energy Efficient - Withstands High Pressures & Temperatures Pre-Filters allow for quicker water balancing with fewer chemicals. Washing a filter will extend its life &amp; clean filters use less energy. The Jet Brush makes this quick and easy. Scum Magnets prevent scum andoil from making it to the filter for fewercleanings.