The IFootage Slider S1 Bundle from iFootage includes the Shark Slider S1 ? with the flywheel and adds extension rails and a longer drive belt. The standard S1 is 31? long end-to-end and features a 25? sliding length, and with the additional rails the sliding length is increased to 47?. The S1 comes with a padded carrying bag which can fit the additional accessories of this bundle as well.