Quick answer: This is a tank accessory from Blue Reef.
Tank boots, bands and valves keep your cylinders protected and working the way they should, and they make heavy tanks easier to handle on the boat and at the shore.
Offered in 3 options, including Blue Reef Tank to Tank Equalizer with Pressure Gauge Din With Pressure Gauge, Blue Reef Tank to Tank Equalizer with Pressure Gauge Din With Pony Gauge, Blue Reef Tank to Tank Equalizer with Pressure Gauge Yoke With Pressure Gauge.
Confirm the tank diameter, thread type or valve compatibility. Anything under pressure should be installed or serviced by a qualified technician. Read Best Scuba Gear Starter Kit. More options: Cylinders & Valves.