This product is either discontinued or we cannot get that from suppliers.
Lenovo 4X20E75123, Thinkpad 230w Ac Adapter slim tip, Power adapter - external, Input Voltage AC 100-240 V.
The ThinkCentre 4X20E75123 is a Spare 230 W AC Adapter purposely made compatible for your ThinkPad. This AC adapter is perfect for use as a spare or replacement adapter for compatible laptops.