110 Volt Fuser Kit is designed to help maintain HP Color LaserJet CP4025n CP4025dn CP4525n CP4525dn CP4525xh CM4540 MFP CM4540f MFP and CM4540fskm MFP. The fusing assembly is the component that bonds toner to paper through a combination of heat and pressure so it needs to be maintained to maintain productivity in your HP printer. Designed for use with Color LaserJet CP4025n/dn CP4525n/dn/xh CM4540 MFP CM4540f MFP and CM4540fskm MFP Maintain your printer s productivity by replacing the component that bonds toner to paper Recycling solution - designed to encourage recycling helping you divert materials from landfill.