Brand new high quality pigtail power supply / adapter / charger tip converter. From old 7.9mm*5.5mm Round Tip to a New Rectangular Tip. Compatible with IBM Lenovo ThinkPad Laptop Notebook PC such as X1 Carbon Yoga 13 Edge and other models using rectangular power connector. 1 for $3.00, 2 for $5.00. Check out our other KSL ads. Thank you and God bless!