One week old pair of Emission Labs PX-4 mesh plates. I purchased these new from TubesUSA on June 8th and used them for 2-3 hours in a Lampizator Big 7. I traded the Lamizator in and did not include these new tubes. The Lampizator runs output tubes at 25% of normal output. These are literally new tubes purchased directly from the importer. I called George from TubesUSA to ask if the warranty transfers to the new owner. His response was " have them call me about warranty ".