... , PT7. Standard: American, German, British, Japan, Chinese8. Material: carbon steel, stainless steel, brass9. Airproof/ Seal: NBR, FPM10. Surface Disposal: Blank-phosphoric polish ... yellow zinc (white) Namehigh quanlity for flange ball valve importerMaterialCarbon steel ,stainlesss steel ,brassSize1/4",3/8",1/2",3/4",1",11 ...