A set of FOUR factory Platinum Matched Tung-Sol 7581A tubes. These are burned in for 24 hours and then factory matched at real world voltages for current and transconductance. The test results are labelled on each tube box as shown.
The new Tung-Sol 7581A vacuum tube is an upgraded 6L6GC (and 7581) tube what will provide more headroom than typical 6L6GC tubes. Tung-Sol actually made the original 7581 better with the 7581A adding additional headroom! A fantastic choice for your Fender tube amp or any other 6L6 based tube amp where you need to increase headroom a touch.
These are made in the Xpo-Pul factory (also known as Reflektor) in Saratov, Russia. They are all recent date codes.
All tubes carry the 90 day factory warranty against defects from date of purchase.