■ This is a Cozina-type chin rest for violin, an evolved version of the Ergona type, ergonomically designed to reduce strain on the neck and jaw. It is made of high-quality boxwood. ■ Weight: 44g (including clamp) ※ Price negotiation is not possible. ※ On Saturdays, Sundays, and holidays, the post office is closed, so we will ship on the next business day. (If there are consecutive holidays, it may not be possible to ship within 2-3 days.)