Product description Read more It is dedicated to;the production of quality aquarium accessoriessuperior.We specialize in all essential aquarium accessories such as aquarium pumps and aquarium accessories.air, stoneair, netfish, filletshrimp, magnetic brush, check valve, tube and separator to configure your aquarium. 4 types of air connectors Air valve connectors are essential elements to combineor divide the air circuits.Easy to useconnect tothe airline andnot to fall.Each connector is hollow to allow air to pass through while remaining airtight.No leaks or clogging.The straight shape is applied to repair or extend pipes.The L shape is for turning corners.The Y and T shapes separate the tubes from each other.air or combine 2 inlets to create 1 stronger outlet. 4 types of aircraft fittings Suitable for 1/2" tubeair ID 5 mm Waterproofeach connection Non-toxic and strong plastic Organize your pipes in order Read more How to install 1 Immerse the ends of the tube in warm water for a while to do itfunction better.2 Make sure both ends of the connectors are unlocked.3 Carefully attach the connectors to the tube and connect them completely.Tips: If a tight fitIf the tube is a little tight, please put some grease to make the tube connect. Read More Airtight Seals Make sure each connection is well sealed and let the flow of water'outdoors.Plug your pump intoair with air pipes to supply aquariums. 4 shapes of connectors The straight shape allows the tubes to be extended or repaired.air.The L shape works for right corners.90 degrees.T and Y shapes can split or combine inputs to create different outputs. Applied Range These transparent connectors work well with duct tube.5 mm air which is suitable formost water pumpsair currents. Read more CV10R CV6R AVC418 AVC402 AVC404 Type Check valve Check valve-return Check valve Air valve connector Air valve connector Quantity 10 pieces 6 pieces 40 pieces 40 pieces 40 piecesColor Red Red Black White White Shape Types 1 1 4 2 4 Connector Diameter 4mm 4mm 4mm 4mm 4mm