Very sensitive beta/ gamma 180g Russian geiger tube. I love these and own about ten of them, but with economic hardships I have decided to part with a PAIR. I have used these in units I built from scratch as well as substitute tubes for Ludlum, Victoreen CDV, Eberline and other geiger radiation detectors. These tubes are new and unused, have simply had them in storage since purchased. Fast shipping, I ship within 24 hours of payment. Here are some specs: working voltage range: 360- 420 V**
length: 100mm
width: 18mm**Note that if you are going to use these in most US made counters, you need to have dropping resistors and/or zeners in place to reduce voltage to the working range. I say this because CDV and other counters are normally 900 V output.

---