PearlbayMusic Store - The Nektar NX-P expression pedal is solid, rugged and ideal for both studio and stage. Rubber gripping keeps it in place during performances and polarity switching ensures it works
Other/unknown Nektar NX-P Expression - Pedal on ModularGrid
M-Audio EX-P Expression Pedal – Thomann United States
Nektar NX-P Expression Pedal With Switchable Polarity And Range Control | Full Compass Systems