Inquiry (采购产品): Material of construction What is the material of construction for the N550-10 AND N550-16 valves? We need this information for our record keeping for both safety and quality as we use these valves in our ammonia supply system for fermentation at Pharma company. **** Hidden Message ***** Chris Iles 1650 Lilly Road Drop Code TL26 Lafayette , IN 47909 USA Company: Eli Lilly Title: Engineer Phone: 765-477-4575 E-mail: c.iles@lilly.com **** Hidden Message ***** c.iles@lilly.com