With Brother laser products the toner and drum work independently - this is cheaper to run than those where the two units are combined. If one runs out, you don't have to replace both items simultaneously, substantially reducing waste, saving precious...
Xerox Brother HL-3180 - black - compatible - toner cartridge (alternative for: Brother TN241BK)
Everyday - black - compatible - toner cartridge (alternative for: Brother DR2300)
Everyday - black - compatible - toner cartridge (alternative for: Brother TN2220)
Everyday - black - compatible - toner cartridge (alternative for: Brother TN2320)
Xerox - black - compatible - toner cartridge (alternative for: Brother TN3480)
Xerox Brother HL-3152 - cyan - compatible - toner cartridge (alternative for: Brother TN246C)
Xerox Brother HL-3180 - yellow - compatible - toner cartridge (alternative for: Brother TN245Y)