Tender For providing of custom bid for services - calibration charges for portable gas detectors of qty 180 detailed in tender document,custom bid for services - service visit charge of qty 6 detailed in tender document,custom bid for services - spare sensor oxygen of qty 15 detailed in tender document,custom bid for services - spare sensor lel of qty 15 detailed in tender document,custom bid for services - filter of qty 2 detailed in tender document,custom bid for services - battery of qty 2 detailed in tender document,custom bid for services - pump of qty 2 detailed in tender document