TANK ONLY. Used in Hughes&Kettner, MarshallTM, Ampeg, Crate, FenderŪ, Mesa Boogie, Guytron, Rocktron, DOD, Summit Audio, and Smokey amps, two spring. Equivalent to 4AB3C1B. RoHS Compliant 4AB3C1B Reverb Tank Long (16 3/4") 2 Spring Unit, Long Decay Input Impedance 8 Ohms, Output Impedance 2250 Ohms Mounting: Horizontal Open Side Down. Connectors: Input Insulated/Output Grounded reverbtank$38.95 Triode, USA Customer Service M-F 9AM-4PM CT 1-800-774-3201 Email us Anytime: questions@triodestore.com