Pentair Dynamic I/II/III Filter Cartridge - 25 Square Feet max-length_24 Feet The gasket is a Full

The gasket is a Full Face type

They are used to lengthen the area that a fulcrum can roll under a diving board when moving the stand is not an option

This is a 3/8 Inch Stenner FKM Duckbill Check Valve for all Stenner pumps excluding models with S4 prefix

This Astral Vertical Sand Filter 63 Inch Standard Series has 4 inch connections

Pentair Dynamic I/II/III Filter Cartridge - 25 Square Feet max-length_24 Feet The gasket is a FullThe Pentair Filter Cartridge replacement has a media filtration area of 25 square feet and is designed for 25 Square Foot Rainbow Dynamic I II III Series RDC RTL RCF Model Cartridge Filters. Pentair reusable cartridge filter elements are made of a superior reinforced polyester material. Pentair elements provide a high degree of water clarity and longer filter cycles. To maintain your pool water cleanliness and clarity, Pentair genuine replacement