These have the same features as the C series of cartridge filters but have larger internal cartridges as their filtering element with a larger filtering surface, in standard sizes with a diameter of 330 mm and height 460 mm for the full cartridge; diameter 330 mm height 230 mm for the half cartridge.

They are made in AISI 304 or AISI 316L stainless steel and the type of cartridge that can be used is:

• Filter only
• Colour stripping only (with charcoal only)
• Adsorptive only (with silicates only)
• Filtering/adsorptive
• Filtering /colour stripping
• Adsorptive /colour stripping
• Filtering /adsorptive / colour stripping