MOTT
Mott High Purity Porous Metal Flow O2, 500 SCCM, 35 Psi, 1/4" Male VCR, F#15
What stands out about the 2000 is the simple interface.
MOTT 30-SLPM 250 PSI MAX, @ 20 DEGREES C
You will find that this ratchet socket wrench has a classic design that never fails.