Universal Sustain Foot Pedal Piano-Style with Polarity Switch 1/4" Input Jack for Digital Piano Electronic Keyboard - Walmart.com
Yamaha FC4A Sustain Pedal / Foot Switch for Yamaha Keyboards - Stage 1 Music
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Amazon.com: The Piano 3 sustain pedal 6.35mm 1/4 Inch Plug Universal for Electronic Keyboards and Digital Pianos, Electric piano, MIDI Keyboards,Synthesizer, With 3.5mm to 6.35mm female jack adapter (Black) : Musical Instruments