This is the MACH-1 RACING high current charge cables for use with most 4S LiPo batteries.
 
Specifications:
Length: 600mm
Colour: Black
Charger input connector: XT60 or 4mm bullet.
Connectors: 5mm Gold plated bullet connectors
Compatible Chargers: Models w/ XT60 or 4mm bullet charging inputs
Cables: 12AWG
Compatible batteries: 4S Li-Po packs with 5mm connectors