1. Could you please send me the opinion of your QC dept. about tubes claimed by Biuro (Zasada) you got in February.
2. Which European countries are supplied with AV tubes and have you received any complaints about the valve?
3. How many producers provide valves for your tubes AV? Have we always got the valves from one producer only?
4. Please check what was changed in the end of 2007. Till that time your tubes AV had been perfect.