LC531XLBK Compatible High Yield Black Cartridge J8551 The symmetrical design works equally

The symmetrical design works equally well for left- and right-handed users

HP LaserJet Pro M102a

the Ergo M575 stays in place while you control the cursor with your thumb

HP LaserJet Enterprise MFP M635

Colours Up to 2

LC531XLBK Compatible High Yield Black Cartridge J8551 The symmetrical design works equallyLC531 and LC531XL cartridges contain built in authentication chips with unique serial numbers. This security feature from Brother was designed to try prevent aftermarket consumables from working. To avoid chip conflicts or recognition errors, please purchase only one cartridge of each colour (Black, Cyan, Magenta, and Yellow) at a time. Buying multiple of the same colour in one order will result in duplicate serial numbers that the printer will