Thank you for viewing! Thanks to you, many customers have purchased our products, and we have a track record of high ratings. We are proud that our rubber is the most affordable and has a high holding power! The photos show the replacement of the deteriorated rubber of a KUN shoulder rest. Photo 5 We also have black rubber from Bonmusica (Germany), so please comment if interested. The tubes are made of American rubber (raw rubber). Sold in sets of 4. If you want 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 type KUN, but we have received information from repeat customers that it can also be used for 3/4 size. (Not genuine) *It is unknown whether there are genuine products. We do not know if it is suitable for other fractional sizes or shoulder rests from other manufacturers. If the rubber deteriorates, your precious violin may slip and fall, so We recommend replacing it early. It is slightly longer or cut to the exact size, so 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 #kunreplacementrubber #BonmusicaReplacementRubberBlackGermany