brother op-4cl - opc belt - 1
model - op4cl vendor - brother international features - opc belt cartridge for use with hl2700cn mfc9420cn the opc belt cartridge will print up to 60000 images when printing on a4 letter sized paper . when you see the replace opc belt message on the lcd panel you should order a new opc belt cartridge from your brother reseller as it is about to reach the end of its life .