Thank you for viewing! Thanks to you, many customers have purchased this item. I am confident that my rubber is the best value, and it will restore a firm hold. This item is a slightly flawed product due to cutting errors. Two out of the four pieces are about 2mm shorter, but the length is not a problem for use. It is listed as a B-grade item. Therefore, the price is lower than usual. Please understand this before purchasing. The photos show the KUN shoulder rest with the deteriorated rubber replaced. The tubes are made of American rubber (raw rubber). Sold as a set of 4. If you want multiple sets, please let me know in the comments before purchasing. This product is for 4/4 size Replacement rubber for the old type KUN shoulder rest. I do not know if it will fit other fractional sizes or shoulder rests from other manufacturers. If the rubber deteriorates, your valuable violin may slip and fall, so I recommend replacing it early. Shipping will be via regular mail, but we are not responsible for any postal accidents. We usually ship on the same day or the next day, but because we use the post office, depending on when you purchase, if it falls on a weekend when the post office is closed, it may take longer to ship. Usually it takes about 3-4 days on weekdays. (Excluding weekends and holidays) Due to the post office.