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Universal Sustain Pedal Foot Pedal with Polarity Switch for Yamaha Piano|Piano| - AliExpress
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QUIK LOK PSP-125 SUSTAIN PEDAL PIANO STYLE POLARITY SWITCH - 8025534017357
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Sustain Pedal for Keyboard - Sovvid Universal Foot Pedal with Polarity Switch... 686082811583 | eBay