The plastic material is non-toxic and harmless and will not affect the health of fish. Installation is simple, just cut an oxygen tube and insert it on the two ports of the control valve. This air valve can help increase oxygen and keep the air fresh, create a healthy environment for your fish. Made of high quality materials, fine workmanship, durable and long service life. This T-shaped air valve has an adjustable knob and can help adjust the volume of air in the aquarium.
