Alloy 90/10 Concentric Reducer Cu-Ni 90/10 Concentric Reducer 90/10 copper Nickel Alloy Concentric Reducer Copper Nickel UNS C70600 Concentric Reducer Cu-Ni WERKSTOFF NR. 2.0872 Concentric Reducer ANSI B16.9 90/10 Cu-Ni Concentric Reducer This can be ordered as a 70/30 Copper Nickel Concentric Reducer or 90/10 Copper Nickel Concentric Reducers. The following pressure ratings are available: