Manually control the flow of vital O2 or switch an air pump "on or off".
Made of Chromium Copper material, air will never leak out. INLET DIA: 3/16", OUTLET DIA: 3/16".
Non-Return Check Valves protect you air pump by preventing aquarium water from back siphoning during a power outage.
Suction Cups fit the Air Valve Distributor and standard tube well, sticking to the tank firmly.
Package Content: 1 x 3-Way Air Distributors, 3 x Non-Return Check Valves, 4 Suction Cups