This is a set of ProTek R/C "TruCurrent" XT90 device and battery connectors. This set contains four male connectors. ProTek R/C "TruCurrent" XT90 Connectors have 4.5mm pins and are made from high-temp Nylon and gold plated spring connectors, both included in the injection mold at the time the connector is formed. ProTek R/C "TruCurrent" XT90 connectors ensure a mechanically solid, low resistance, high-amp capacity connection and are the ideal power connector for high current applications. Features Low resistance for high current capacity Ergonomically designed and easy to grip Protected to avoid shorting and reverse polarity Superior technology suited to today's high power applications Designed with convenience and reliability in mind