... : Brass, aluminum; Thread size: 1/4", 3/8", 1/2"; Description: Multiway connectors(Air Compressor Part); Material: Brass, aluminum; Thread size: 1 ... /4", 3/8", 1/2";Surface treatment: Acid washing ... -shaped connectors, cross connectors, manifold connectors. Multiway Connectors(Air Compressor Part)