Our default prep inlet flow for calibration is 100 mL/min. In order to assure optimum pressure drop across the splitter, please specify the prep inlet flow if it is significantly different from the default calibration prep inlet flow rate. You can specify the prep inlet flow (mL/min.) within a range of 50 - 150 mL/min. under Custom Specification field. Replacement Resistor Set includes Low Flow Capillary Resistor and High Flow Resistor Cartridge.