Similar the the Underwood pickup. Available with just one element (Sh951) and two elements (SH950).
Similar to the Fishman pickup.The four piezo discs are attached to the bridge, one element underneath each string, with double sided adhesive tape.
SH SB1, SH SB2
Basic single- or twin-disc transducer.
SH 965 NFX-B
The newest model from Shadow. The piezofilm elements mount under the bridge feet. The preamp is attached to the strings between bridge and tailpiece, and runs with a small 3V cell battery.
RB-Pro (Rockabilly Preamp + pickups)
Mode: passive, incl. preamp
Features: includes bridge pickup (SH951) and fingerboard pickup (SH2500);
preamp runs on 9V battery or wall adaptor; built-in tuner; phase;
bridge channel: EQ (Bass, Mid, Treble), Subsonic, fingerboard channel: Low cut, Treble control
available at www.kontrabass-atelier.de