10 Pack Aquarium Air Pump Check Valves Clear Plastic One Way Non-Return Check for Valve for Fish for Tank Black/Red/Whit

The check for valve is suitable for common aquarium air pumps. Please do not use them with CO2 systems. One-way check for valve for aquariums and fish tanks. Protect your air pump by preventing the aquarium water from anti-siphoning during power outages. Made of durable transparent plastic. When the socket inside is stuck, please use a paper clip to poke from the input end to the output end. 10 Pack Aquarium Air Pump Check Valves Clear Plastic One Way Non-Return Check for Valve for Fish for Tank Black/Red/Whit. Features: brand new and high quality. The check for valve is suitable for common aquarium air pumps. Please do not use them with CO2 systems. One-way check for valve for aquariums and fish tanks. Protect your air pump by preventing the aquarium water from anti-siphoning during power outages. Made of durable transparent plastic. When the socket inside is stuck, please use a paper clip to poke from the input end to the output end. Stomatal diameter: 0.15 4mm, total size: 2.16 x 0.