... steel angle valve 1,facutory and competitive price 2.short delivery time,15-30 days 3.polished finish,looks nice 1. ... chemical layer,it will drop off if the electroplate quality is not so good.Some may lose its ... better than the Cu,the wastage of the machining tool is dozens times than the Cu,the wastage ... ,we guarantee that if you find the goods’ quality is bad,we can help you to machining them ...