Genuine Muratec DK-2550 drum kit (formerly know as DK-2030). For the F-300, F300, F-305, F305, F-315, F315, F-560, F560, F-565 & F565 series machines and the MFX-1330, MFX1330, MFX-1350, MFX1350, MFX-1450, MFX1450, MFX-1930, MFX1930, MFX-1950, MFX1950, MFX-2030, MFX2030, MFX-2050, MFX2050, MFX-2550, MFX2550, MFX-2570 and MFX-2570 series of machines. 30,000 yield on the 'MFX' machines & 20,000 on the 'F' machines, it's counted by the machine!