The Waterway 218-4000 Poly Storm jet diffuser is designed for compatible jet assemblies and comes in white. A diffuser like this is useful because it helps shape internal water movement within the jet, making it an important working component behind the visible face of the assembly.Replacing a worn or damaged diffuser can help restore the intended feel and flow behavior of the jet without requiring a full body replacement. This Waterway part is a practical choice when the internal flow-shaping component is no longer performing as intended.For compatible Poly Storm jet repairs, this Waterway diffuser is a practical replacement when the internal flow-directing part needs to be renewed. Waterway Poly Storm jet diffuser White finish Designed for compatible jet assemblies Helps restore internal flow shaping Useful for repair and rebuild work