Pure copper wire material made. Exquisite workmanship with great performance. Safe and durable. The speaker wire cables allow to install an aftermarket radio using the existing factory wiring and connectors. Easy to use. most of the wires are there using standardized color codes, which made installing the head unit a breeze. Wire harness do not directly plug and play, Solder connections and heat shrink tubing for best results. The harness will not compatible with factory amplified systems. Radio wiring harness Replacement for 2001 - 2007 Mazda, 2011 - 2017 Mazda 2, 2004 - 2017 Mazda 3, 2006 - 2018 Mazda 5, 2003 - 2017 Mazda 6, 2001 - 2002 626, 2007 - 2011 CX-7, 2007 - 2015 CX-9, 2002 - 2009 Miata/ Miata MX5, 2000 - 2002 Millenia, 2003 - 2006 MPV, 2001 - 2003 Protege/ Protege 5, 2004 - 2009 RX-8, 2002 - 2010 Tribute.