Hese 53108900 spring barrels nut assemblies are compatible with Pool & Spa, FNS, FNS, Clean and Clear, and quads Pool and Spa D.E Filter, including models FNSP24, FNSP36, FNSP48, FNSP60, CCP240, CCP320, CCP420, CCP520, 188592, 188593, and 1885964 They seamlessly fit with the 190003 tension clamp set for secure This set includes 2 packs of 194997 machined, serving as essential replacements for bung or rusted parts on pool and spa filter housings while providing spare components for future maintenance needs Simply remove old and install these replacement 194997 machined by hand tightening, providing a quick and hassle release for maintaining your pool or spa filter systems Featuring engineered threads, the 194997 machined an airtight seal at the filter housing connection, effectively prevents pressure loss in spa systems for optimal comportment machined from sturdy brass, these offering excellent rusts resistance and long lasting comportment in pool and spa water environments, ensuring efficient operations over time, Manufacturer: Mekalero