10x 5.5mm Round Jack to Square End Adapter for IBM Lenovo Thinkpad Laptop Power

10x 5.5mm Round Jack to Square End Adapter for IBM Lenovo Thinkpad Laptop Power  Works with the following models:  • IdeaPad Yoga 11  • ThinkPad Yoga S1  • ThinkPad Helix  • ThinkPad T431s  • ThinkPad X230s, X240, X240s  • ThinkPad T440s (with Intel graphics)  • IdeaPad Yoga 13  • ThinkPad Edge E531  • ThinkPad Edge E540  • ThinkPad T440s (with descrete graphics)  • ThinkPad X1 Carbon  • ThinkPad T540p  • ThinkPad W540p  • ThinkPad W540 (i5+K1100M) Package includes:  10pcs  connection adapter