Thumb Piston
A very reliable hall-effect (contactless) thumb piston with a concave surface and curved edge in the AEolian-Skinner® style. Available in white, red, black, or yellow, with a standard black or optional green surround. The piston can be configured for either positive or negative switch output and positive or negative light input. The LED back light mimics the warm color of an incandescent bulb. Custom engraving is available for all piston buttons.