This is Muchmore 4mm & 5mm Multi Bullet Male Plug 2 pcs.
Muchmore Racing 4mm & 5mm Multi Bullet Plug is 4 point contacts provide Ultra low resistance
When using batteries with different battery connector sizes (4mm or 5mm), can be connected to a charger without any extension
A 10awg wire is also available to cope with high amp chargers
Muchmore 4mm & 5mm Multi Bullet Male Plug (2 pcs)