(!!!!) (Best Pair) 5881 Sylvania black base NOS 1970's - 1980 (85ma and 85ma)
$ 139.99
1 Pair) 5881 Sylvania black base NOS 1970's - 1980 same build
1 tube) 85ma Gm=6600 branded RCA 1980
1 tube) 85ma Gm=6300
See more: vacuum tube
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 (Best Pair) 5881 Sylvania black base NOS 1970's - 1980 (85ma and 85ma)&Category=vacuum tube&ImageURL=http://cdn.shopify.com/s/files/1/0333/7633/products/58818585.jpg?v=1571439019){kind=link}
 (Best Pair) 5881 Sylvania black base NOS 1970's - 1980 (85ma and 85ma) "Pin It")