... 2.surface treatment:powder coating, painting, spraying,etc OEM cnc cast iron valve body Specifications cast iron valve body 1 ... copper, bronze, aluminum, zinc etc2sandgreen sand, sodium silicate sand etc3mahinelathe, CNC, drilling machine, milling machine, boring machine, planting machine, machining center4processsand ... products must be checked 3 times before packing. OEM cnc cast iron valve body