5/8" Hose I.D.x3/8" MPT Brass Barb Insert. It is a Lead-Free compliant product which meets Public Law 111-380. Suitable for hose clamp or crimp type ferrule, this one-piece brass insert offers excellent vibration resistance and a positive connection. It has an operating temperature range of 32 to 200 degree F and is intended for use with plastic tubing or rubber hose.
WARNING: This product can expose you to lead, a chemical known to the State of California to cause cancer and reproductive harm. www.P65Warnings.ca.gov