The clock of eras complete set includes:

a control chart (complete clock of era set)
• a mute chart
• booklet of the cards explaining the duration and significance of each Eon.

Eons- Hadean Eon, Archaen Eon, and Proterozoic Eon

Eras- Cenozoic Era, Paleozoic Era, Mesozoic Era, Neozoic Era

Booklet and Charts are printed and laminated on heavy cardstock for durability.