1/8" Hose I.D.x1/4" MPT Brass Barb Insert. This lead-free compliant product meets Public Law 111-380 and is suitable for use with hose clamps or crimp-type ferrules. It is designed for plastic tubing or rubber hose and has a temperature range of 32 to 200 degrees Fahrenheit. The barbed edges provide a positive connection, while the excellent vibration resistance ensures durability. Barb size is hose ID.