I don't think I have electrical tape that is grey with a red stripe and then blackOr colour matched very expensive...
Electrical tape.
Thanks, my n+1 is a matt finish and is a Cube Agree GTC SLT 2013, see Cube Sizing thread for pics+1 for fleabay. Don't know what your n+1 is, but FYI you can also get 'helicopter' tape in a matt finish as well now.