This is a package of Pentair 170146 Inner and Outer Cartridge Filter Elements for System 3 S7M400 Filters. It has a media area of 136 Square Feet for Inner Cartridge and 264 Square Feet for the Outer Cartridge. Cartridges are made of superior reinforced polyester pleated material with polyurethane end caps. Pentair reusable cartridge filter elements provide a high degree of water clarity and longer filter cycles. To maintain your pool water cleanliness and clarity, Pentair genuine replacement cartridge elements are the number one choice in cartridge filtration.

Pentair filter elements are designed to meet NSF's high quality performance and durability standards with Pentair filters. Only Pentair replacement filter cartridges will provide maximum hydraulic efficiency, exceptional first pass debris removal, and extended durability. This cartridge is individually packaged with the Pentair name on end caps and plastic wrap to identify as genuine Pentair parts.