Acoustic guitar oil-soaked vintage saddle, pre-processed. Made of cow bone and pre-processed, making installation easier. This product is an authentic nut made by a specialized workshop using a special method to achieve oil penetration. Regarding the sound, it depends on preference, but the oil effect significantly reduces wear from the strings. Tuning becomes more stable. Saddle: Length approx. 72mm, Height approx. 9mm, Width approx. 2.9mm Blank nuts & saddles without string groove processing are also available. If you would like one, please comment. I also have many other guitar maintenance supplies for sale. Thank you! (*^^)v Basically, shipping is by regular mail (no insurance), but postal accidents occasionally occur. For an additional 60 yen, you can change to Click Post, which allows tracking. Please request this in the comments. 【Notes】 ・Shipping is closed on Saturdays, Sundays, and holidays; shipping will be on the next business day. ・Basically, if payment is received by 3 p.m., there is a high possibility of same-day shipping. ・All items are sent with free shipping. ・We have stock, so you can buy immediately without commenting. ・We will send it in simple packaging. The shipping method varies depending on the product, so please check. ・If you purchase multiple items, there will be a discount on shipping costs. Please contact us via comments before purchasing. ・The color may differ slightly from the actual product due to lighting conditions and monitor differences. ・We try to answer questions as quickly as possible, but please note that there may be delays depending on the timing. ・We will exchange or refund for initial defects, so please contact us before evaluating. We may not be able to respond after evaluation.