Does Kirby shampoo attachments fit on all Kirby vacuums

Shampoo systems for Kirby vacuum models:
Generation 3 (G3)
Generation 4 (G4)
Generation 5 (G5)
Generation 6 (G6)
Ultimate G (G7 or UG)
Ultimate G Diamond Ed.(G7 or DE)
Sentria (G10)
and their parts and components are interchangeable.