This is a flat round gray PE-LLD plug, which is intended to close unused cable glands with a PG thread. It allows you to maintain a complete seal. It is very easy to install manually and remove from the cable gland.
It is suitable for a type of PG cable gland thread.
The flexibility of its material allows it to be easily integrated into the assembly.
These gray LDPE plugs are used for the family of cable glands.