... OEM serviceMy company produce high quality for flange ball valve importer with quick delivery. In strength of Quality ... Chinese8. Material: carbon steel, stainless steel, brass9. Airproof/ Seal: NBR, FPM10. Surface Disposal: Blank-phosphoric polish (black), G ... -electroplated yellow zinc (white) Namehigh quanlity for flange ball valve importerMaterialCarbon steel ,stainlesss steel ,brassSize1/4",3/8", ...