This Vacuum Breaker integrates with Kohler® handshower components to prevent back flow of polluted water if the water pressure drops. The unit features solid brass construction and a resilient finish for durability. Kohler®, 9660-2MB, Persona™ Vacuum Breaker, Series: K-9660, Persona™ Collection, 1/2-14 Nominal, NPSM End Style, 1-1/4 in Dia x 1-1/2 in H Dimensions, Vibrant® Brushed Moderne Brass