ITEM NAME:Set of 3 Aquarium 4m Air Tubes with Air Pump Accessories Tank Description: All In One Package - comes with Check Valve, Air Stone and Air Tube, and Connectors. 4m/13ft Airline Tubing - 0.5cm Standard ID Clear and Flexible material. Desired length for most tank, Toxic-Free, White, Flexible, and Kink-Resistant. 6 Air Stone Cylinder - 4.2cm Airstone can be easily driven by even Nano air pumps. Suitable for aquarium, tank and hydroponics. Measure 2 X 4.2cm (D x H). 12 Non-return Check Valves- Red clear valve can prevent water from back siphoning. 12 Connectors (T-shape) - Perfectly connect standard tubing, T-connector allows you to combine two inputs to create one output with dual outlet pumps. Package Includes: 3x Airline Tubing 6 x Air Stone 12 x Non-return Check Valve 12 x T-connector Description: All In One Package - comes with Check Valve, Air Stone and Air Tube, and Connectors. 4m/13ft Airline Tubing - 0.5cm Standard ID Clear and Flexible material. Desired length for most tank, Toxic-Free, White, Flexible, and Kink-Resistant. 6 Air Stone Cylinder - 4.2cm Airstone can be easily driven by even Nano air pumps. Suitable for aquarium, tank and hydroponics. Measure 2 X 4.2cm (D x H). 12 Non-return Check Valves- Red clear valve can prevent water from back siphoning. 12 Connectors (T-shape) - Perfectly connect standard tubing, T-connector allows you to combine two inputs to create one output with dual outlet pumps. Package Includes: 3x Airline Tubing 6 x Air Stone 12 x Non-return Check Valve 12 x T-connector SKU: DMO0015524819480248.Suitable for aquarium, tank and hydroponics. 4m/13ft Airline Tubing - 0.5cm Standard ID Clear and Flexible material. Desired length for most tank, Toxic-Free, White, Flexible, and Kink-Resistant. 6 x Air Stone.