Reference: NRF/SAEON/EFTEON/30/2026-27. PROVISION OF REPLACEMENT SPARES AND MAINTENANCE SERVICES FOR YSI SONDE WATER QUALITY MONITORING EQUIPMENT FOR THE EXPANDED FRESHWATER AND TERRESTRIAL OBSERVATION NETWORK (EFTEON) FOR A PERIOD OF FIVE (5) YEARS Source: National Treasury eTenders OCDS release. Read the official documents for complete requirements and submission instructions.