R1101H-2
https://www.ultraflow.com/shop/r1101h-2-r1101h-2-18920
https://www.ultraflow.com/web/image/product.template/18920/image_1920?unique=199a7a2
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Secondary CO2 Regulator - 1 Pressure 2 Product - Wall Mount - 0-130psi - 5/16 to 3/8 Multi Barb Inlet & Shut-Off Outlet