Spare parts and toolsThe Contractor shall provide from the pump manufacturer all the spare parts and tools required during the commissioning and maintenance periods, including those below: One set of complete bearings One set of wear rings One set shaft seal One impeller Three set of O-rings of seal Additional spare parts as recommended by the pump manufacturer to cover two years of operation following the maintenance period. The Contractor shall supply, furnished by the pump manufacturer, a complete set of all special tools required for maintenance of the pumping equipment complete with the list of spares.