Keep your connections strong with a variety of quality replacement amplifier jacks for new and vintage Fender© amps. Direct replacement 4-pin mono amplifier jack. Includes lock nut and washer. Fits Princeton Chorus, Pro 185, BXR? Series, Stage 112SE, Ultimate Chorus?, Roc Pro? Series, Performe?r Series, Bronco?, '94 Twin©, Princeton 112+, Deluxe 112+, Automatic? GT, and Blues Junior? amplifiers.