30PCS Brass Pipe Fitting, Hex Bushing, Reducer Adapter, Reducing Hex Nipple 1/2

Connector Type Reducer, Reducing Hex Nipple, Hex Bushing. Male National Pipe Taper (NPT) threads for connecting to female threaded pipes. Reducer Adapter: Premium solid brass with thicker wall, more durable than iron and iron galvanized pipe fittings, 1/2" NPT male pipe x 3/8" NPT female pipe.

eBay