Высокое качество 40*4 мм нержавеющая сталь проверить один способ для стандартного аквариума CO2

Features:
100% brand new and high quality
Can prevent the aquarium from the water flowing back, which is caused by the decrease of CO2

pressure,and keep the function and service life of CO2 bottle.
When used in the Ozone generator, it can prevent the Ozone from flowing back to the air pump and

eroding the propeller.
It can protect the power head from the water flowing back which is caused by power cut.
Fits standard aquarium CO2 pipe(4mm) internal diameter.
Specification:
Material: Stainless steel
Size(L*W):40mm x 4mm(approx)
Color: Silver
Quantity:1 pc(air pump is not included!)
Package includes:
1pc * Stainless Steel check
Note:
Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.
Due to the difference between different monitors, the picture may not reflect the actual color of the item.

Thank you!