Hayward StarLite Hi-Temp Lens Gasket (SPX0540Z2) unicel Flow switches like this are

Flow switches like this are important where reliable water-motion sensing supports both safety and correct system sequencing

Control system for compatible Leisure Bay LB501S spa applications

which can be important in a thorough seal-area rebuild

Useful when multiple cartridges need coordinated replacement

Fits Polaris 380 pressure-side pool cleaners

Hayward StarLite Hi-Temp Lens Gasket (SPX0540Z2) unicel Flow switches like this areThis hi temp lens gasket is designed for compatible Hayward StarLite light assemblies. It helps seal the lens area after service and is especially important when heat, water, and chemical exposure have aged the original gasket. Use a fresh gasket during light repairs to support a reliable seal and reduce the risk of water entering the fixture. It is a recommended replacement whenever the light is opened for service. Hi temp lens gasket for compatible