This auction is for one Jackson 648 calibration tube and instructions for calibrating your Jackson 648 Tube Tester using this tube. This tube works on every version of the tester, including models 648, 648A, 648P, 648R, 648S, 648-1, and 648-1T. This tube CANNOT be used to calibrate any other type of tester. Please consider also buying our Jackson Model 648 Complete Tube Tester Manual, eBay item 150864808445.

Tubes are guaranteed for 30 days from the day of receipt.

SHIPPING:
We combine shipping on multiple items.

We have thousands of tube types in stock. Please contact us if you cannot find what you want, so we can list it.

Due to too many requests by overseas customers, I have to state in the USA it is illegal to falsify the value on Customs forms, as well as being against eBay rules. Do not buy this item and then ask us to falsify the forms. We always declare the sales price, as required by law. If you have asked any seller to falsify the forms in the past, ask yourself this question... Why would you want to buy from a company that demonstrates it is dishonest?