Dura-Line's MicroTechnology fill ratio calculators are designed to provide information on compatible fiber optic cable and MicroDuct products. This calculator assumes an optimal duct/MicroDuct fill ratio range of 50-75% (Outer Diameter (OD) of cable over Inner Diameter (ID) of duct) for jetting micro cable into MicroDuct. The optimal fill ratio is just one of many variables which should be considered when planning a cable installation. This information should be used indicatively and Dura-Line assumes no liability for damages resulting from the use of these calculations in actual deployments. For more detailed analysis and support before, during, and after your installation to ensure you are choosing the optimal product for your needs, please contact a Dura-Line specialist.