Regulator valve for oxygen

Regulator to control the airflow.
It has a switch, which lets you can control the airflow.
Suitable for fish tanks, ponds, aquariums, etc.

Specifications
Material stainless steel

Size
1 head 2.9cm and 1.1″
2 heads 5.3cm and 2″
3 heads 7.2cm and 2.8″
4 heads 9.1cm and 3.5″
5 heads 11.2cm and 4.4″

Notes:
The real product colors may be slightly different from what you see in the images.
The product dimensions may be slightly different from what is written in the product specifications.