Chrome construction: The durable high-quality chrome construction of this sustain foot pedal allows for long-lasting use as well as eye-catching attractiveness.0 inches (H) x 4. US Sustain Foot Pedal with Polarity Switch for Digital Electronic Keyboard Piano USA Seller Ship Fast! This rubberized bottom cover of this sustain pedal ensures a secure grip on a variety of floor surfaces to keep the pedal in place.