SODIAL(R) 10 PCS Aquarium Airline Air Tube Tubing Connectors Filters - SODIAL Retail Packaging Aquarium Airline Connectors for mending or extending standard airline hose They are made of plastic material for long time use. This Aquarium Tube Connectors set including 5 pieces T-connectors and 5 pieces straight connectors Straight Connectors Dimension (Each One): ~1.08"(L) x 0.32"(D) T-connectors allow you to combine two inputs to create one output.