Add-on Computer-HP ProCurve compatible Gigabit-SX-LC SFP-J4858C-A0 SFP is a hot-swappable input/output device 100% compliant for all of our networking product lines Loaded with OEM specific configuration data required for compliance. Perform identically to the OEM transceivers. Can be mixed and deployed with other OEM or 3rd party transceivers, for seamless network performance.