These printers use the ZT50DR cartridge:

Sharp PC 6000

Sharp SF 6000

Sharp SF 6600

Sharp Z 50

Sharp Z 52

Sharp Z 52 II

Sharp Z 55

Sharp Z 57

Sharp Z 57 II

Sharp Z 70

Sharp Z 72

Sharp Z 75

Sharp Z 75 II

Sharp Z 76

Sharp Z 77

Sharp Z 85

Sharp Z 85 II

Sharp Z 85 III

Sharp Z 87

Sharp Z 88