LaserJet 4000, 4050 and 4100 printers, and the HP Print to Mail accessory. Below are the topics covered in this. feed roller is the paper pickup assembly. The. HP C8057A Maintenance Kit for HP LJ4100 for LaserJet 4100. kit for the hp LaserJet 4100mfp contains fuser, rollers and instructions for installation. The idea of making an instant print of your photos is not a new one, with Fujifilm, LG and…