【Application】The way check valve is suitable for 4mm/0.2in diameter tubes, can mend or extend standard air line hose.
【Premium Plastic Material】The check valve is manufactured from premium plastic material, and sturdy, can effectively prevent water from entering the air pump.
【100% Satisfaction Experience】If there are any quality problems with our goods, please us and we will promise to re-delivery or refund.
【Function】This air pump check valve you air pump by preventing aquarium water from back siphoning during a power outage.
