This is a pack of two pairs of 5.5mm diameter "Super Bullet" Solid Gold Connectors from ProTek R/C. There are total of two female and two male connectors in the package. The ProTek R/C "Super Bullet" Solid Gold Connectors are an absolute must
for high current / high voltage applications! With lower resistance
than a typical Dean's style ultra plug and traditional spring-type
bullet connectors, they are the new standard for brushless motor
applications. They can be used for battery connectors or motor to speed
control connectors and are an ideal power connector for devices such
asbattery chargers, and power meters.ProTek R/C is an A Main Hobbies brand.