The COExhaust Sliding Suction Rails are designed to easily provide the required ventilation to the spot where it is needed. The rails can be equipped with reels or simply a hanging hose. The rail system utilizes a 5" or 6" diameter rail profile, depending on required air volume, and is manufactured of extruded aluminum, making it seamless and one piece. No bolting together or sealing of the rail is required. The rail incorporates opposing rubber lips which seal under the negative pressure and only opens as the trolley passes through and spread them, allowing them to reseal behind the trolley.