316l platinum iridium 80 20 mp-35n Rtm, or stainless steel, such as l the high nickel steel mp-35nrtm coated with platinum-iridium spring of % solid platinum, solid %-20% platinum-iridium.
Rtm, or stainless steel, such as l the high nickel steel mp-35nrtm coated with platinum-iridium spring of % solid platinum, solid %-20% platinum-iridium..