Pentair 272535 1-3/8-Inch Outside Diameter Compression Spring Replacement, Six-Way 1-1/2-Inch Hi-Flow Pool and Spa Multiport Valve Compression spring replacement Fits Pentair Six-Way 1-1/2-inch HiFlow pool and spa multiport valves Measures 1-1/4-inch length by 1-1/4-inch height by 1-1/4-inch width