XT60 Female to XT90 Male Plug Wire Conversion Adapter is For RC model & Charger. The wire length is about 20mm.
1. RC model is with XT90 plug while the battery is with XT60 plug.
2. Charger is with XT90 plug while the battery is with XT60 Plug.
You can use the conversion adapter to transform the plug of the battery to the one suitable for RC model and charger.