The Hayward SPX1075F Flo Control Slide Plate with Screw is an essential component for pool and spa systems, particularly for use with Hayward skimmers. With its 15.24 x 10.16 x 15.24 cm sliding plate, the skimmer's water flow can be precisely adjusted, providing the best possible filtration and circulation. It works by changing the skimmer's internal opening, which gives the user cont... https://www.usapoolshop.com/spx1075f-hayward-flo-control-slide-plate-with-screw