Dura-Line's Dura-Line's MicroTechnology calculators are designed to provide information on compatible fiber optic cable and MicroDuct products. This calculator assumes a maximum fill percentage of the existing conduit of 55% (sum of cross sectional area of inner duct(s) and cable(s) over the cross sectional area of the ID of the existing conduit). The optimal fill percentage 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.