HP Interface (Product) J8021A is compatible in the following HP Models:

HP LaserJet 700 Printer series

HP LASERJET ENTERPRISE 700 PRINTER M712DN - CF236A
HP LASERJET ENTERPRISE 700 PRINTER M712N - CF235A
HP LASERJET ENTERPRISE 700 PRINTER M712XH - CF238A
HP LASERJET ENTERPRISE 700 REFURBISHED PRINTER M712DN - CF236AR
HP LASERJET ENTERPRISE 700 REFURBISHED PRINTER M712N - CF235AR
HP LASERJET ENTERPRISE 700 REFURBISHED PRINTER M712XH - CF238AR