start

WYIN W01-02 Aquarium Mini Pressure Gauge CO2 Elect... Price:$46.06 WYIN W02-02 Multiple CO2 Regulator Connector 1 To ... Price:$26.40 ISTA External CO2 Ceramic Reactor Diffuser?16/22mm... Price:$26.00 CO2 Regulator for Diffuser Live Plant Aquarium aqu... Price:$18.71 DICI Mini Two-stage CO2 pressure regulators with s... Price:$65.55 WYIN Aquarium Plant CO2 Simple Gauge Needle Valve ... Price:$18.31

end

Also have the interface W21.8-14 and M22*1.5 and power 110V if  you need can  connect me

quarium CO2 Regulator with two Gauge

Quality design and construction achieves excellence in control.
Dual gauge pressure indicators (tank volume and flow pressure / working pressure)
Compatible with all types Aquarium Diffusers (including Bazooka and UP inline Atomizers)
Industrial-grade Precision Needle Valve.
Innovative design provides extreme accuracy, dependability, and extended service life.
Compatible with most high density tubing
Compatible with most CO2 atomizer and diffuser