For Hayward DEX2400S Sand D.E. Filter Air Relief Valve Gauge Assembly ECX270861 Fitment: Suitable for Hayward Microcrystalline Glass Filter, Hayward Pro Series Commercial Sand Filter, Hayward Pro Series Plus Sand S311SC, S311SXV, S360SX, Hayward Superstar Transparent Series, 2000-5000 and 4500-5500 Series Filters Features: 1) This swimming pool accessories replacement is engineered for smooth operation, experience versatility, and functionality, offering you a smooth using experience for maintaining your pool's filtering system, you can take them as gifts for people who need .