Hex nipple size: 3/8'' X 3/8'' NPT male; outside diameter: 3/8 inch; length: 34.4mm | Nipple pipe fitting type: threaded; item shape: nipple (nipple for connecting and extending pipes) | Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of pipe | Nipple fitting material: stainless steel 304,(brass is too flimsy and will broke in use), which can be connected to copper, brass, plastic, aluminum, and welded steel | Stainless steel nipple specification: temperature rating: -20-460 degrees fahrenheit; working pressure: 0-360 PSI; pressure rating: class 150