Mount With Style The Hydra Mounting System (HMS) is specifically designed to provide an easy to use, highly effective adjustable tank mount solution for Hydra TwentySix, FiftyTwo and Hydra HD model lights. The HMS allows for vertical, horizontal, and rotational adjustment. The HMS features a slim profile with integrated cord management to minimize visual clutter and complement the clean look of your Hydra fixtures. HMS2ARM Double Arm Kit Great for mounting multiple lights on one rail across your tank. Requires a mounting rail to fit your tank, and brackets for each Hydra (sold seperately). Multi light mounting employs a modular approach. For tank mounting simply combine an arm kit (a) with the appropriate rail (b) and the correct number and type of mounts (c). Alternatively you can create a custom multi-light hanging solution with a rail (b) the correct type and number of mounts (c) and a HMS hanging kit (a). Adapts to Your Tank Tailor the HMS to your tank. Width, height, and even the angle of the light is able to be fine-tuned. Slide & Swivel Slide and swivel your lights to exactly where you want them, then fasten them in place to best illuminate your livestock. Cable Management The HMS features a slim profile with integrated cord management to minimize visual clutter and complement the clean look of your Hydra fixtures.