Bathtub Accessories, Whirlpool Jet manufacturer / supplier in China, offering PVC Air Distribution 1"Sp X 1"S X (12) 7mm Barbs Plastic Air Manifold, PVC Air Distribution 1/2"Sp X 1/2"S X (4) 3/8"Barbs Plastic Air Manifold, PVC Air Distribution 1"Sp X 1"S X (6) 3/8"Barbs Plastic Air Manifold and so on.