Made for JDR Music, this rosin is great. It is grippy and has a clear appearance. This makes this rosin quite amazing. It comes in two varieties, 3G and Ultra.The Ultra recipe is much more grippy than regular. They are both great and slightly different. Our version of this rosin features a picture of the JDR Music logo!. This is a quality rosin that was developed by a professional cellist and it sells at a great price! See the video below for a review and demonstration of this great rosin.