Epson 5000 - Manual (Page 135)

Ribbon Black ribbon cartridge #7753:
Life expectancy:
In LQ at 48 dots/character: 2 million
characters
In draft, at 28 dots/character: 3.42
million characters
Film ribbon cartridge #7768 (optional):
Life expectancy (in LQ, at 48 dots/character):
0.2 million characters
MTBF: 4000 power-on hours
Print head life:
200 million strokes per wire (with fabric ribbon)
100 million strokes per wire (with film ribbon)
Dimensions and weight:
Technical Specifications 7-9