International competitive bids are invited for the supply of 2 x 125 MVA, 220/66/11 kV and 2 x 40 MVA, 66/11 kV transformers for the 220/66/11 kV Gamasa gas-insulated switchgear (GIS) substation (Package B) funded by European Development Partners, which includes the European Investment Bank (EIB), European Union (EU), Agence Française de Développement (AFD) and KfW Development Bank.