This is a pack of two ProTek R/C 5mm to 4mm Bullet Reducers. These reducers are an absolute must for racers looking to use 5mm bullet connector batteries without having to install 5mm bullet connectors on their ESC and charger leads. Simply plug these reducers in the 5mm bullet connector hole in your 5mm battery, and away you go! No need to convert all your connectors to 5mm or buy a whole new inventory of 5mm batteries.

Part # PTK-5005