Overview Reviews Product Description Aqua Nova Steel Valve 5 Output (5 way ) Description: - rustproof (plated) - Fit 4mm/6mm standard aquarium air line/tubing. - Air(Co2) control on each outlet. Product Videos Custom Field Product Reviews Write a Review Write a Review × Aqua Nova Aqua Nova 4mm Airline Steel Valve - 5 Way Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *