I’m partial to the Japanese Nichiban gaffa tape, it’s great and inexpensive, doesn’t leave residue (pretty strong though if you’re gonna use it on delicate surfaces).

But Tesa gaffer tape is shit.

At least in a professional setting it is frowned upon because it leaves a lot of glue residue on floors and cables, which is a pain in the ass to clean.

Gerband is also German and the way better product, at least regarding gaffers tape.

Don’t buy any of them. The absolute best is Gerband from Thomann. Sticks very well, but isn’t as nasty as Tesa. It’s made for events so it’s also easy to remove after a few days. Hands down my go-to tape. https://www.thomann.de/intl/gerband_gewebeband_258_schwarz.htm

Trivia: duct tape is terrible for ductwork, and never used by HVAC professionals. If you’re doing some home repair, search “hvac tape for ducts” to evaluate your options.

I can vouche for the lineup of Würth Adhesive Tapes too