Improved mechanical strengh and durability (5000 hours).
Four tubes in one lot.
Four tubes with similar or close parameters.
Tested on L3-3 tester.
We ship via International Registred Airmail.
Tracking number is provided.
Important information for buyers from Australia, Oceania, Central Africa and South America: due to increased shipping cost to these regions, shipping price is calculated individually.
!!!Dear buyers, despite the treacherous Russion invasion of Ukraine,