"I'd recommend the Swagelok B-4MG fine metering valve.
You can find it on-line at www.swagelok.com.
The full catalog with all the specs for their needle valves is
at http://www.swagelok.com/downloads/we.../MS-01-142.pdf.

Cheers,

Michi."

Paul on the Clippard side.......

I think you have a nice valve in both cases and you get a nice item
for your $.
One's the economy Clippard, runs about 11$, the other is the old Nu
Pro Swagelok which is very nice over the long run if you are willing
to pay more for them(38$). I find the Clippards are fine, but the
Swagelok's are nice and worth the cost difference. Depends on the
funds:-)
But they both do a good job.

Regards,
Tom Barr