www.nmzcopper.com NMZ Copper is a manufacturer in China(mainland) bronze valve body fitting drain fire parts gunmetal knitted hose shower head stainless steel sink.CDA83600/sae40/lg2-c/cc419k/CuSn5Zn5Pb5-C, CDA84400, and low lead C89836, C89833, C89520. We are applying NSF 61.