Gleason Series "S" Spring-Driven Electric Cable Reels are designed to be mounted on moving machinery. Electric current flows from your power source to the current consumer through the cable you specify. S-Reels utilize self-contained slip ring assemblies which transfer current to the cable mounted on the rotating spool. Models for 2 to 36 conductors, 30' to 120' for lift, drag and stretch applications (200' for retrieve applications)