We highly recommend using this optional protective boot with our 7-pin plug VTS-590 when wiring the plug to a tow-vehicle connecting cable like our VTS-819. It fits over the back end of the connector on the threaded section and seals against dust and moisture. It stays on with friction, but we suggest adding some silicone sealant on the threades as an additional adhesive and water barrier. 

• 1.5" long.
• For .460" to .720" diameter cable.