This is a pack of two pairs of 2.0mm diameter gold plated inline connectors from ProTek R/C. There are total of two female and two male connectors in the package.
Thursday, Dec 6 2018 (about 2 years ago)
ProTek RC 2.0mm Gold Plated Inline Connectors (2 Male/2 Female)
Ridiculous price for two Banana clips, not even very durable.