Chrome plated brass. California flow rate compliant product for lavatory faucets, 1.2 GPM (gallons per minute) at 60 psi (pounds per square inch) and kitchen faucets, 1.8 GPM (gallons per minute) at 60 psi (pounds per square inch). 55/64", 27 female thread.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.