Thank you for viewing! Thanks to you, many customers have purchased our products, and we have a track record of high ratings. We are confident that our rubber is the most affordable and has the highest holding power! The photos show the KUN rubber after replacing the deteriorated rubber. The tubes are made of American rubber (raw rubber). Sold in sets of 4. If you would like to purchase multiple sets, please let us know in the comments before purchasing. This product is for 4/4 size. It is for replacing the claw rubber of the old KUN type, but repeat customers have informed us that it can also be used for 3/4 size. (Not an official product) *Uncertain if there is an official product. We do not know if it is suitable for other fractional sizes or shoulder rests from other manufacturers. If the rubber deteriorates, your valuable violin may slip and fall, so we recommend replacing it early. It is slightly long, or cut just right, so please cut off any excess with scissors. We will ship by regular mail, but we are not responsible for any postal accidents. (Regular mail is not delivered on weekends and holidays) Due to the post office's circumstances.