Fans for 21.5″ Late 2009 – Mid 2010 – Mid 2011

A) CPU Fan – Mid 2010-Mid 2011 – 922-9385

B) CPU Fan – Late 2009 – 922-9122, B1208PTV1-A

C) HDD Fan – Late 2009 – Mid 2010 – Mid 2011 – 922-9121, 069-3694, BAKB0615R2HV004

D) Optical Fan – Mid 2011 – 922-9909

E) Optical Fan – Late 2009 – Mid 2010 – 922-9120, 069-3692, BAKA0722B2HV002

Images left to right, CPU Fan, HDD Fan, Optical Fan.