19mm inline radiator caps for water intercoolers etc

[sirLachlan]

I need a 19mm ( 3/4) inline radiator cap for a bike project .
Nothing local was obvious to me so I'm going to get some off amazon . They are the same ones froozen boost sell .
These would be handy for water to air intercooler setups . Just wondering if anyone else wanted one or more whIle I'm at it ?
Or if anyone else has better suggestion
https://www.amazon.com/Remote-Radiator- ... B00ME3AFTC