2 Pcs Aquarium Non-return Red Clear Plastic Air Pump Check Valves
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.
Check valve;use for : fish tank,aquarium
Hole diameter : 1.8mm/ 0.07";total size : 5.3 x 1.5cm/ 2.08" x 0.59"(l*max.d)
Material : plastic;color : clear, pink
Weight : 9g
Package content : 2 pcs x aquarium check valve