Description
Aquarium co2 flow precision adjustment.Both ends for 4*6 mm(ID *OD) PU trachea ( co2 proof tubing).Needle valve,check valve and bubble counter 3 in 1.Material : Needle valve is Cu Zn alloy ; Bubble Counter is Aluminum alloy and acrylic.Please fill water into bubble counter before use. Both ends for 4*6 mm(ID *OD) PU trachea ( co2 proof tubing). Needle valve,check valve and bubble counter 3 in 1.
