HP J4878-61301 - ProCurve Switch GBIC Module - Provides four slots for installing any of the supported ProCurve mini-GBIC`s (GBIC´s Not included) Retail
HP J4856-69001 - ProCurve 9300 unmanaged mini-GBIC port module - Has eight open slots for mini-GBIC transceiver modules - (J4856A) Retail