Outlets allow you to adjust the airflow for 8 aquariums. Inlet port diameter: 10mm and the diameter of the 8 OUTLETS is 5mm. Manually control the flow of vital O2 or turn an air pump on or off. Made of chrome copper material, air will never leak. Not suitable for CO2 systems. Weighs 0.2 kg, measures 16 x 6 x 0.5 cm.
