Description: These bullets fit all packs but have been redesigned to compress more to provide a better fit in packs that have smaller than usual power connection tubes like RevTech and Reedy batteries. Features: ? 18mm overall length. ? The short version will fully seat in battery packs. ? Can minimize contact resistance. ? Work with the latest available lithium polymer batteries. Package Include: 10pcs * 4mm or 5mm Male Bullet Connectors