Products using advanced science and technology, excellent performance, beautiful appearance. Desperation productMaterial of Manifold: Aluminum alloyManifold (interior) : Red cooperLayer of Manifold : GB/TLong of Manifold : 120mmWidth if manifold : 10mmModel : 12Tubes---34TubesCertifivate :CE,ISO9001,CCC,SGSHeat preservation: 72 hoursthe life is for 3years.