6.5 feet pump accessories & agrave; standard aquarium air, 2 air release stones, 2 control valves, 4 suction clips, 2 straight connectors and 2 t-connectors Air tube features: These air tubes are made of transparent and flexible plastic, they are durable. wear and crease; In addition, they can be put in salt water or fresh water. Functions of the non-return valve: This non-return valve can prevent water from returning to the pump. air in case of power failure; You can place it in the tube of the airline between the pump. aquarium air and water, it is suitable for aquariums and aquariums. Useful air stones: Air stones help & agrave; add oxygen & agrave; your hydroponics growing system and reduce the carbon dioxide concentration for your aquarium, fish tank, pond, hydroponics or circulation system; Additionally, they can extend the shelf life of your nutrient solution and provide oxygen for your fish. 2 Different Connectors: T-connectors combine 2 inputs together to create 1 output,
