Pentair 073370 Noryl Rotor Valve with Tapered Seal Replacement SM and SMBW Series Pool and Spa D.E. Filter Rotor valve noryl with seal replacement Fits Pentair SM & SMBW 4000 and 2000 series D.E. filters valve models SMBW 4048, SMBW 4060 Made of noryl Includes tapered seal Measures 6-inch length by 6-inch height by 6-inch width