Check Valve for Air Pump - Transparent + Black
Brand No Model HY556 Quantity 1 piece(s) per pack Color Black + transparent Material ABS Specification Specially designed Non-Return Valves will protect you air pump by preventing aquarium water from back siphoning during a power outage; Place these Air Pump Check Valves in your airline tubing between your air pump and aquarium water to prevent water returning down the air line Other Features Fit for 4/6mm tube; Diameter: 4mm; Supreme Anti-reverse effect Packing List 1 x Check valve