Excellent vintage tubes, IMO one of the best GE produced. 7581A is equivalent to 6L6GC and can be used where these or KT-66 are called for. Tubes are in very good condition, boxes not so much but are original and functional. These sound great in my amp. (lows and vocals especially excel) but get little use since I purchased GEC KT-66's, a bit better as they should be for more than 3X the price.

I'll cover PayPal fees and Conus shipping.