Aquarium Air Manifold/Splitter

5 Way air manifold for aquarium air tubing. I used 5 M3x20mm screws as the valves. Fits standard 3/16 ID tubing. It is tight but it fits. The screws are also tight. This is to keep the air from leaking. Internally there is a .5mm gap on each side of the screw to allow air flow when backed out 2mm or more. The more you back out, the more air.