The HMS Multi Light Mounting System is composed of three individual components that let you customize the mounting system for your exact tank and number of Hydra LED modules. The track system lets you slide your lights from side to side allowing you to position them perfectly for the best coverage and reduction in shadowing. Most mounting brackets have a fixed position for each light where the HMS Multi Light System lets you select how many Hydra LEDs you want to use and the exact location and orientation of them within the mounting system. The bracket for the Hydra 32 LED lights that works with the HMS Multi Light Tracks. Holds one Hydra 32 LED Includes hardware Slides within the HMS track system HMS Mounting System Components: HMS Multi Light Mount Kit – Includes vertical HMS rails and mounting feet that can sit on the side of your aquarium\’s rim. HMS Single Light Mount – Includes vertical & horizontal HMS rails with tank attachment to mount a single Hydra LED light HMS Hanging Kit – Allows you to suspend the HMS Tracks from your ceiling or wall brackets. HMS Multi Light Track – Select the track that matches the length of your tank HMS Hydra 32 or HMS Hydra 64 Bracket – Custom brackets that hold your particular Hydra LED light and lets you slide and spin each light individually for the perfect positioning. What\’s Included? 1x Hydra 32 HMS Bracket Mounting Hardware Note: HMS Multi Light Track required for use