5-Piece Plastic One Way Aquarium Fish Tank Air Check Valves, Clear/Black F6R2

ITEM NAME:5-Piece Plastic One Way Aquarium Fish Tank Air Check Valves, Clear/Black F6R2 5-Piece Plastic One Way Aquarium Fish Tank Air Check Valves, Clear/Black F6R2 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. Air Check Valve Use for: Aquarium, Fish Tank Color: Black, Clear Material: Plastic Hole Outer Diameter: 4mm Overall Size: 42 x 13mm/1.65" x 0.51" (L*Max. D) Weight: 11g Package Contents: 5 × Air Check Valve Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/-1-3 cm..Use for: Aquarium, Fish Tank. Color: Black, Clear. Material: Plastic.