XISAOK Aquarium CO2 Bubble Counter Valve-Regulator Diffuser Single-Head Dual-Head New

100% brand new and high quality Material: Aluminium Alloy Color: Silver Due to the bubble counter, you can clearly know the volume of carbon-dioxide through the rising air bubbles from the bottom to regulate the carbon-dioxide supply for plants in the fish tank Additionally, it features a non-return function to prevent the backflow when the pressure changes It is made of tough material, so it is durable and reliable A small thing will make your fish tank different Small and compact Easy to install and replace Size: See the picture Quantity:1 Pc Note: Due to the difference between different monitors, the picture may not reflect  the actual color of the item. Thank you!