This Cable Seal Plug, designed specifically for use with GMP Tools' Tornado and Jetstream cable blowing machines, ensures a secure fit for cables within the diameter range of 18-20 MM (.71 - .79"). As a key component in the configuration kits for these machines, it enables efficient compatibility with matching cable and duct sizes, making installation and operation smoother for users. With precision engineering, this insert not only enhances the functionality of your cable placing equipment but also contributes to safe and effective cable management during projects.