Product Description Pool filter tension control clamp kit is designed for seamless installation of Hayward Swim-Clear and Hayward Pro-Grid cartridge filters, which ensure a secure, leak-proof seal. Made from quality materials, pool filter tension control clamp kit is lightweight and long-lasting. Pool filter tension control clamp kit is perfectly matched to the filter housing dimensions for quick installation, easy knob tightening and easy replacement. For Hayward Swim-Clear Filter Models: C2030, C4030, C50530, C7030; for Hayward Pro Grid DE Filter (manufactured after 2007) Models: DE2420, DE3620, DE4820, DE6020. Pool filter tension control clamp kit adopts high-precision sealing structure design, effectively eliminating the risk of leakage.