Output: DC20V 4.5A, Connector size: 5.5mm*7.9mm

IBM ThinkPad R60e AC Adapter Description:

Replacement IBM/Lenovo 20V 4.5A AC Adapter
Weight: 0.87lbs
Input: AC100-240V (worldwide use)
Output: DC20V 4.5A
Power: 90W
Outlet: 3-prong
Connector size:
Internal Diameter: 5.5mm
External Diameter: 7.9mm
With pin inside
Brand New Replacement Product, works as genuine parts, 100% OEM Compatible!!
Remark: US power cord is included

Warranty of IBM ThinkPad R60e AC Adapter:

12 months