1/2 Fuel Oil Check Valve Non-Return One Way Petrol Diesel Gas Air Aluminum Alloy 12mm, Pack of 2

I would like to be able to use this as a check valve on a compressed air line. it will have to hold pressure up to 180 psi. is this work for that?

I’m trying to get a fuel check valve order today but apparently sellers say it’s aluminum but buyer say it’s plastic which is it

Will this work for a brake booster?

is the 1/4 on the outside of barbed