Inquiry (采购产品): Proving Rings My company has recently been looking into possibly purchasing 1 or 2 proving rings for our Brinell Machines. PSI: 3,000 lbs, 2,000 lbs and 1,500 lbs What model numbers would you recommend and what would be the purchase price for those models? Also how often would you recommend them to be recalibrated for maintenance purposes? **** Hidden Message ***** Jon Donathen P.O. Box 488 616 Indiana Avenue Rochester, IN 46939 USA Company: Rochester Metal Products Title: Quality Technician Phone: 574-223-3164 Fax: 574-223-0486 E-mail: jdonathen@rochestermetals.com **** Hidden Message ***** jdonathen@rochestermetals.com