This is the Coke Bottle (ST) style Mesa Engineering 6L6GC. Beam tetrode power tube known for its sweet, warm tone. Valve number equivalents include 6L6GC, 6L6GCR, 6L6G, 6L6GA, 6L6GB. Brand new vacuum tubes from old stock. No longer sold new. Restore the sound of your older Mesa Boogie with these original NOS tubes.
Tested and matched on a RoeTest professional computer testing system, the best tester available today. Also matched on a Maxi-Matcher 2.