I have 4 J4858C-OEMR SFP 1000Base-SX transceivers for sale.

The packaging lists them as OEM Procurve Gigabit 1000 Base.

However I know they will not work in HP kit as I had to buy original transceivers which is why I have these 4 available.

They may work in other kit such as netgear etc.....

20 each including postage.

Ben