... .6) Connection: weld, clamp , threaded, union, nut7) Polish: mirror polish, dull polish,Sub-light,180G, 240G, 400G, tumble ,pickling , passivation8) Packing : inner ... ,thread,union,nutStandard3A,SMS,DIN,IDFpressurePN2.5-32MPAPOlish mirror polish,dull polish,sub-light,180G.240G,400G,tumble,picking,passivationPackinginner paper carton ...