Duncan Twin Tube Blue with adaptor, well used, with stretches of wear across the top and bottom of the front (I'll try to take some better pictures asap if needed) but in perfect playing condition and sounding fantastic.  Originally described as imparting a huge clean, SRV/Blackface type of sound (which, I'm sure, with the right guitar and amp it will do), it is really extremely versatile and will give my dark-sounding low power tweeds and el-84 powered amps beautiful sparkling high-end and chime and/or massive amounts of low end without changing the fundamental tone (inherent sag and soft attack) of the amp. Two channels, both capable of lead and rhythm (I actually prefer the lead channel with gain set low for rhythm) and both channels have serious gain and volume on tap. I think these high-voltage microtube fueled pedals are far better than the sought after but lower voltage Chandlers and Bk Butler Real Tubes people still pay big bucks for. Likewise, compared to the few far more expensive current tube-powered pedals I've tried...I'd take this at less than half the price any day. Your sound with no artifacts but exceptionally musical added bass, treble or gain, so does what a great pedal should do. Paypal only, must pay immediately, ask questions, I'll get back to you asap, almost always same day shipping, packed packed extremely well, 10 bucks continental USA shipping, free pickup (I'm in central Mass). If you have less than 15 feedbacks or excessive negatives please contact before bidding. Please check my perfect feedback and bid with confidence, I have been selling high end instruments, amps effects etc for years, and see my other auctions for more interesting effects, etc. All sales final but guaranteed as described. Thanks.