Amazon.com: FZONE Sustain Pedal for MIDI Keyboards Digital Pianos Foot Pedal 6.6FT Extension Cable, Polarity Switch : Everything Else
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Universal Sustain Foot Pedal Piano-Style with Polarity Switch 1/4" Input Jack for Digital Piano Electronic Keyboard - Walmart.com
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Professional Sustain Pedal from Proline | Proline PSS2
Spectrum Dual Polarity Sustain Pedal (Yamaha or Casio) - Walmart.com