R04200 -Type 1, niobium tsy misy lokon'ny reactor;
R04210 -Type 2, Niobium tsy misy loko ara-barotra;
R04251 -Type 3, Reactor grade niobium alloy misy 1% zirconium;
R04261 -Type 4, Fiara niobium ara-barotra misy zirconium 1%;