... and Gas3.Material Available: Product namePrecision cnc parts / cnc partSteel1018,1045,1050,1117,1141,1144,11L17,11L41,1215,12L14,4140,4142 ... ,Nylon,TeflonOtherBronze,Brass,Hardened metal,Precious metal CNC aluminum cylinder with inner threaded lathe parts in dongguan china