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👍【Package contains】: 18 x check valves, 6 x air stones, 12 x suction cup clips, 12 x I-connectors and 12 x T-connectors, complete tools match well with your fish tank.
👍【Check valve】： the check valve is great for aquarium and fish tank; You can put it in the airline tube between air pump and aquarium water to prevent water back into the air pump during a power outage.
👍【Bubble release air stones】: approx 19 (D) x43mm (H) /0.75 x 1.7inch, they are durable and can produce fine bubbles continuously to diffuse oxygen efficiently in your fish tank.
👍【24pcs connectors (Straight & T-shape)】: Perfectly connect standard tubing, T-connector allows you to combine two inputs to create one output with dual outlet pumps.
👍【Wide applications】: Airline Tubing Air Pump Accessories are good for both salt and fresh water fish tank, aquarium and any glass surface; Easy to install and remove.