1/4" Hose I.D.x3/8" MPT Brass Barb Insert. It is a Lead-Free compliant product which meets Public Law 111-380. This one-piece brass insert is suitable for hose clamp or crimp type ferrule and has an operating temperature range of 32 to 200 degree F. Its barbed edges provide a positive connection and excellent vibration resistance. Barb size is hose ID.
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