...Compression x Male Reducing Adapter Pipe Fitting 3/8" OD. COMP X 3/4" MIP Lead Free Brass Material: brass, lead free brass Product Features · ADAPTER CONNECTOR: Joins 3/8" OD COMP X 3/4" MIP Pipes within Instrumentation, Hydraulic, and Pneumatic Applications; Works with Aluminum, Plastic, and Copper Tubing. · LEAK-FREE: Creates a Secure, Leak Free Seal in All Compression Applications · SUPERIOR QUALITY: Highly Durable Brass