Material:plastic 3 different air tube connector(T Shape ,I Shape, + shape),10 Meter tube ,2pcs aquarium air stone ,2pcs controller Aquarium Air Pump Flexible Airline Tubing great for all your aquarium airline needs and Clear and flexible tubing that resists kinking.Safe for fish and good for fresh or salt water environments Made of mineral material, used to aerate aquariums by diffusing bubbles for improved oxygen circulation. 3 different connector is easy and convenient to install. Fit to use with 5mm aquarium air line tubing. 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.