Description: Designed to be compatible with most models, the check valve has an upgraded housing material made from a crack resistant polymer blend, which is more resistant to wear and tear than the previous product and lasts twice as long. With a check valve that can withstand high water pressure operation, it will solve the problem when your pool cleaner gets stuck on an obstacle and although your back-up valve open, the nozzles no longer spray water and keep it out. It is constructed of PC material. The length of this product is 20.3cm and width is 9.4cm. It is suitable for Polaris Zodiac 180 280 380 pool cleaner. Item Name: Backup Valve Material: PC Features: Easy to Install, Durable, Wear Resistant Size Details: L: 20.3cm/7.99", W: 9.4cm/3.7" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Backup Valve