This is the SpeedTek RC 4.0mm High Current Bullet Connectors (3 Female).  The package contains 3 female connectors.
 
If you want something done right, you usually have to do it yourself. SpeedTek RC was never totally satisfied with the options for bullet connectors for high power applications, so they designed and manufactured their own. SpeedTek RC Bullets make a perfect connection, every time. Simple as that. Available in a lovely shade of gold.
 
Includes:
1 x SpeedTek RC 4.0mm High Current Bullet Connectors (3 Female)