Replacement Reverb Tank for 4AB3C1B Solid, Sturdy Construction Long (16 ¾") 2 Spring Unit , Long Decay (2.75-4.0 seconds) Input Impedance 8 Ohms, Output Impedance 2250 Ohms Input Insulated/Output Grounded Horizontal,Open Side Down Mounting Plane Used in Fender™amps with tube reverb from 19... See More