JJ's EL84 is a great replacement for guitar amps or hi-fi.</br>EL84/6BQ5</br>Available in Singles?? Matched Pairs or Matched Quads - please select from list.</br></br>Product Description</br></br>JJ's EL84 is a great replacement for guitar amps or hi-fi. EL84/6BQ5?? Available in Singles?? Matched Pairs or Matched Quads - please select from list.</br><br/>http://www.amazon.com/gp/product/B003FO89CE