This adjustable flow splitter is for Pre-Column Applications. Our default inlet flow for calibration is 0.5 mL/min. assuming a pressure drop across the column of 1,500 PSI. In order to assure optimum pressure drop across the splitter, please specify the inlet flow rate and the column back pressure if it is significantly different from the defaults under Custom Specification field. You can specify the inlet flow (mL/min.) within a range of 0.25 - 1 mL/min.