The Ultra-Thin Square Showerhead starting with good old-fashioned craftsmanship featuring solid brass construction, we add state of the art turn ceramic disc valves with lifetime warranties, the worlds largest offering of decorative PVD finishes and quality controls that meet or exceed government codes, including national and local lead-free and water conservation standards. Solid brass construction Flow Rate: 1.8 GPM, 2.0 GPM, 2.5 GPM 1/2" swivel inlet 10" square face Self-cleaning rubber jets Codes/Standards Applicable ASME A112.18.1/CSA B125.1 CEC (2.0 GPM and 1.8 GPM) DOE (2.5, 2.0 and 1.8 GPM) Commonwealth of MA