This adjustable flow splitter is for Post-Column Applications. Our default inlet flow for calibration is 20.0 mL/min. In order to assure optimum pressure drop across the splitter, please specify the inlet flow if it is significantly different from the default calibration inlet flow rate. You can specify the inlet flow (mL/min.) within a range of 5 - 40 mL/min. under Custom Specification field. Also please provide the part number and the serial number of the splitter when you order Replacement Resistor.