... steel, Cast Iron 2)Processing:Forgin-Machining-Hobbing-Heat treatment Hub UnitFeatures:1).Standard material according to technical drawings2).ISO9001 certificate3 ... type of Auto-parts, such as Auto-Sprockets, Auto wheel hub units, and so onThe Sprocket & Platewheel in European Standard No ... 2 3/8"-->2" 3 3/8"-->2" The autobobile hub units including Generation I,Generation II,Generation III..Our factory ...