First, And this is important.

I have been selling for over 23 years and have no Negative (or even Neutral) reviews. ALWAYS POSITIVE. Any Item may be returned within 30 days of delivery. If it's dead, send it back for a refund. You have no risk.

These are unused in original manufacturers packaging, left over after project concluded.

These are new but were mis-labeled by the manufacturer and are actually RMB-4-SSV which are 0.5 to 5.0 SCFH.