The Assault RC 5mm to 4mm Gold Plated High Current reducer is made to slip snugly into any 5mm bullet hole in your performance lipo pack to allow for your already installed 4mm bullet to slip fit into the reducer. This nifty little tool will allow you not to have to change your bullet connectors from your speed control if you are using different lipo packs with different size bullet inserts. A must have in anyones tool box.
