Maintenance kit can be Compatible with: the following models T703U Trace-Level Photometric Ozone Calibrator and equivalent E series.The kit contains the following items: 1 - ORIFICE, .006 BLUE/NONE1 - ORIFICE, .002 ORANGE/BLACK1 - ASSY, DFU FILTER1 - ASSY, CARBON SCRUBBER2 - FILTER, SS1 - FLOW RESTRICTOR, 5000-1/4-10000CCM NONE1 - FLOW RESTRICTOR, 5000-1/4-5000CCM BLACK2 - SPRING 4 - ORING, SAMPLE FLOW1 - ORING, 2-112V1 - ORING, 2-018V

  Typically ships within 5 to 7 working days, depending on inventory availability.