- Protect you air pump by preventing aquarium water from back siphoning during a power outage.
- Place in your airline tubing between your air pump and aquarium water to prevent water returning down the air line.
- Hole Diameter : 2.3mm/ 0.09";Total Size : 4.8 x 1.7cm/1.89" x 0.67"(L*Max.D)
- Material : Plastic;Color : Clear, Black
- Weight : 14g
- Package Content : 2 Pcs x Aquarium Check Valve
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