O Rings? Who’s the o ring Guru?

[АлександрД]

Anyone up to the challenge?

Threads in diving regulators etc, o-ring sizes
here is my collection of threads and o-rings

 

[Scubagaskets]

Threads in diving regulators etc, o-ring sizes
here is my collection of threads and o-rings

Can I help you.?

 

[flyboy08]

Threads in diving regulators etc, o-ring sizes
here is my collection of threads and o-rings

Thank you!

Hope all is well my friend?

 

[Scubagaskets]

Can I help you.?

Catalogue - Premium O-rings Provider for Scuba Diving
This is what I got so far