CrazyDeal 5mm 3-Way Plastic Air Line Tubing 10Pcs Joint Connector adorable nice Aquarium Fish Tank Clear Aquarium Airline Connectors for mending or extending standard airline hose. They are made of plastic material for long time use. They are excellent for use with dual outlet pumps. Durable plastic construction, 3 way tee shape, easy and convenient to install. Fit to use with 5mm aquarium air line tubing.