Name for PCB isolating tape (usually found in notebooks)
The black stuff is probably &quot;acetate cloth electrical tape&quot;. 3M makes a number of different types, and they're all available in various widths (some subject to MOQ, of course- they will typically split a full width to order and you'll get however many rolls that amounts to- something like 36&quot; = 915mm).
There are also conductive tapes that generally have a silvery appearance that are used for EMI shielding.