The 6-head aquarium oxygen dispenser and 6 check valves can easily adjust the airflow of the air pump Features The 6-way air valve distributors have good pressure resistance, can withstand 2 kg pressure. Simple operation and safe to use The seal is smooth and polished, and the workmanship is fine, and it will not leak when connected to the hose The check valve can prevent the aquarium water from flowing back into the air pump, damaging the air pump and avoiding danger. Product details Material: stainless steel, plastic Colour: silver, red Size and weight: Dispensing valve: 11.45 cm ,121g;Inlet 8mm,outlet 4mm Check valve: 5.3cm,3g; Package included Air distribution valve 1 * 6 Heads 6 * Check Valve