1,All kind of specification are available. 2,Standard according to customer's requirment. 3,quick delivery. stainless steel valve ball: 1,Merterial: 304 A105 LF2 42CrMo 1Cr13 316 F51 Monel 17-4PH2, Application: valce ball3,specification: according to the customer's requirement.4,Standard: GB/T12220-1989 ASTM AISI ISO90001.5,Min order: according to the specification.6,High qulity and reasonabl ...