I am very wary of products like this because they are easily counterfeited. However I believe these to be genuine because they match the product specifications on the 3M website correctly, they have the correct internal markings on the cardboard spools, the package labeling matched the 3M website photo, and they feel the same has my other 3M tapes. They have good stretch ability and reasonable tensile strength. I have not done any resistance measurements with a megger, but initial simple chicks measure fine. If you're only marking wires you can use a copycat product, but for real electrical and electronic work I need a brand I can trust. The price was fair and I believe I got an honest product. Recommended.
Rating:
[5 of 5 Stars!]