... ,Supply various camshafts for trucks,semi-trailers. 2,produce10 tooth slack adjust arm other spare parts. 3,BPW standard. We can ... supply various camshafts,slack adjuster,fifth wheel and Kingpin for trucks, semi-trailers.1 ... for trucks, semi-trailers.2,produce Brake drum,10 tooth slack adjust arm and other spare parts.3,BPW standard 1 ...