... and suppliers in China, equipped with a professional stainless steel ball valve parts manufacturers factory, welcome to ... Key Specifications/Special Features:Materials: plastic, Delrin, nylon, PTFE, stainless steel, 15-5PH, 13-8MO, 17-4PH, 304, 316, ... machining center, CNC turning lathe, milling/grinding machine, centerless grinder, drilling/boring/honing machine, planer, line cutting, ultrasonic ...