Genuine extension cable. $29 at Apple. Usually $27 on Amazon
The 1.8-metre Power Adapter Extension Cable is an AC extension lead that provides extra length for your Apple power adapter
Use it with MagSafe and MagSafe 2 power adapters, 10W and 12W USB-A power adapters, and 29W, 30W, 61W and 87W USB-C power adapters
If you use the Apple Macbook charger with the 2 pin plug, using this will eliminate the static sensation you might get when you touch the metal body of the computer while charging.
Thanks. My adapters are so big and heavy it knocks over power board so I should probably get some of these official Apple ones.