Inside some routers with long antennae wires, you see them taped to the pcb to stop them moving about (for examplehttps://www.reddit.com/r/mikrotik/comme ... ltap_lte6/).

What tape is this?

Thanks

IMHO it's kind of cloth electrical tape:https://www.amazon.com/cloth-electrical ... rical+tape
它不仅是性病cky but also it does not get "gluey" after some time as plastic tapes.
In cars it protects cables and mekes less noise when the "wire rope" hit the metal parts.