R04200 -Mofuta oa 1, Kereiti ea Reactor e sa kopanngoeng ke niobium;
R04210 -Mofuta oa 2, Kereiti ea Khoebo e sa kopanngoeng ke niobium;
R04251 -Mofuta oa 3, Alloy grade niobium ea Reactor e nang le 1% zirconium;
R04261 -Mofuta oa 4, Alloy ea khoebo ea niobium e nang le 1% zirconium;