Demon, I got mine used, but when you initially buy it, it comes with a sample tube for the calibration of your choice. Each time you change injectors, you have to get a new tube, which usually costs about $30.00, or you can probably find one from someone with a used one for $10-$15 bucks.
-As a side note, I am looking to get rid of my 73mm C&L. I have both 19 and 24lb sample tubes. I don't know what they are going for nowadays, so I am taking offers. It is in the beginning stages of being polished and looks much better than the rough cast that comes from C&L. If anyone is interested, please send me an email and we can work something out.
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