Sicks Japan is a manufacturer that produces original and collaborative products, including high-quality wind instrument parts. This is a custom finger button made of ebony for the Yamaha Eric Model YTR8340EM. It has a lacquer finish and weighs 4g each. Made of ebony, it resonates well and has a good response, making the instrument stand out on stage. There are some light scratches and some plating wear on the back. Instant purchase is OK. Please refrain from comments asking for a price reduction.