Air Pump Check Valve One Way Non-Return

Description

• The check valve are for common aquarium air pumps. Please DO NOT use them with CO2 system. Great one way check valve for aquarium and fish tank.
• Protect you air pump by preventing aquarium water from back siphoning during a power outage.
• Check valve is made of durable clear plastic. Net weight: 0.14 oz / 4 g. Please use a paperclip to poke it from Input side to Output side when the outlet inside gets stuck.
• Check Valve air Hole Diameter: 0.15″ / 4mm; Overall Size: 2.1″ x 0.58″ / 5.3 x 1.5 cm (L*Max.D)