Love love love this little mini thing. However, it is very small (the size of the front pocket of jeans), so don't take it if you need more than 3ft. I use it to compare imperial measurements to imperial (metric) measurements when things are listed in metric measurements, and to estimate how big or small something is when it's described in a sales description here on Revain or elsewhere. It's sooo comfortable. I use it daily. Disadvantage, so small, easy to lose π so bought it. But of course I now have two of them because I found the first one straight away after it received a replacement. But I'm glad I have 2 now.
π Dioxide Controller for Digital Gas Monitoring
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