3M27
Scotch woven Glass Electrical BALUN Toroid and core wrapping Tape

cat#   3M27
Scotch 3M27, BALUN Toroid and core wrapping tape:  Spun Glass Toroid wrapping tape.

When winding BALUNs with Formvar, or other magnetic wire, use 3M # 27 glass tape to cover
the balun core.  An application of this glass tape will protect the wire from sharp edge cuts, or
other wire damage.