8 row printer ink tubes are compatible with modified R1800, R1900, R2000, P400, R2400, and R2880 printers.Designed for use with continuous ink systems, these black ink tubes provide fluid transfer for consistent printing performance.The set includes eight tubes arranged in a single row configuration, intended for precise installation and stable ink flow.Each tube is constructed to support standard ink line connections and fits common aftermarket print head setups.This replacement part is intended for printers that have been modified to accept external ink supply systems.