High-quality plastic, however, the union nut is not cleanly deburred in 3 places, so you have to rework, if you want it to be easy to screw. \ R \ n \ r \ nThe prices here at SVB for plastic parts are generally clear to me expensive. I usually only buy if I do not get them somewhere else or if I have to pay shipping costs there for 1 part. Here I have bought a hose connector, which cost a proud 12, - Euro and is really only to be called as cheap plastic scrap. Estimated material value: 10 cents. Estimated Proudktionskosten in China about 20 cents.