Bach, Cornet, Flugelhorn, Trumpet, Pearl Finger Buttons, no pearl insert, 1 each, Bach part numbers nickel B3024 & lacquer B3024LA. Fits instruments such as the CR300, TR300, & FH200. These are not Stradivarius finger buttons but will fit. Threads are 6-36 threads per inch (tpi). Contact me if you wish to verify your model's fit or you need other parts.