A3641-69003 - HP 4 slot HSC Expansion Board for K-Class A3641-69003 - HP 4 slot HSC Expansion Board for K-Class $184.98
A3489-60002 - HP 4 Slot HSC Expansion Board for K-Class A3489-60002 - HP 4 Slot HSC Expansion Board for K-Class $214.96