The Epson 372 Photo Printer Ink Cartridge is primarily associated with the Epson PictureMate PM-520 portable photo printer.
Multi-Color/All-in-One (Some sources also refer to it as "Tri-Color," which usually means Cyan, Magenta, and Yellow, but the 372 often includes Black as well for a 4-color system).
Typically contains Cyan, Magenta, Yellow, and Black (4-color ink system) in a single cartridge unit.