Keep your printer operating at its peak with the HP B5L37A toner collection unit. This genuine HP product fits perfectly into your HP printer and collects waste toner from around 54, 000 prints before it needs replacing. Maintenance free The HP 5L37A unit is ultra-easy to install and replace and ensures you get consistently high-quality prints with crisp images and text. When you buy a genuine HP B5L37A waste toner collection unit, you\'ll never have to worry about maintaining your printer, as this unit does it all for you. Why do you need a toner collection unit? Unlike ink printers, Laser printers use toner, which is a very fine powder. When each page is printed there is a tiny amount of toner residue and the HP toner collection unit filters it out of your system leaving your printer clean and well maintained. The HP B5L37A Will be in tip-top condition for up to 54, 000 prints. When the toner unit need replacing, your printer will inform you on the information screen. Do not re-use Don\'t try to empty and re-use your B5L37A toner collection unit as it can easily cause you problems. The waste toner needs to be recycled professionally. To recycle a discarded toner-collection unit, follow the instructions that come with your replacement unit. er page The HP B5L37A Colour Laser Jet Waste Toner Collection Unit is compatible with the following HP printers; HP Colour Laser Jet Enterprise M552dn; HP Colour Laser Jet Enterprise M553n; HP Colour Laser Jet Enterprise M553dn; HP Colour Laser Jet Enterprise M553x; HP Colour Laser Jet Enterprise M553dh; HP Colour Laser Jet Enterprise MFP M577dn B5L46A; HP Colour Laser Jet Enterprise MFP M577f B5L47A; HP Colour Laser Jet Enterprise Flow MFP M577c B5L54A; HP Colour Laser Jet Enterprise Flow MFP M577z B5L48A; HP Colour Laser Jet Managed MFP M577dnm B5L49A and HP Colour Laser Jet Managed Flow MFP M577cm B5L50A. Replacement HP Laser Jet Toner Collection Unit Page Yield: 54, 000 Compatible with: HP Color Laser Jet Enterprise M552dn; HP Color Laser Jet E