Will this gauge work?

Other than being the size of a cup saucer, will this gauge work for me? I am trying to replace a flow gauge with a pressure gauge on my reg. Since pressure is pressure, I say yes, but thought I would ask anyway.

Doesn’t look like the image came through.

Nope, that wasn’t the problem. Idiot me forgot to include the link. It’s all moot now, as I found a previously unknown Airgas franchise in town that has what I need.

Sorry!