Aquarium Airline Bulkhead

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This is a two-piece bulkhead designed to pass standard size aquarium airlines through thin-walled vessels with ease. I utilize it to pass airlines through algae reactor walls, but its applications extend far beyond this task, including hydroponics. The airline and locking ring fit should be snugly secure, relying solely on friction to hold everything together. If a tighter seal is necessary, applying a small amount of silicone to the airline and both bulkhead parts will ensure they remain sealed.