50's replica black cotton string specifically made for wrapping vintage style Tele® bridge pickup coils. No need to dye the wax or string black anymore! We had the string dyed black with the correct 8-ply cotton material just like the original string found on the early 50's Blackguard era Tele® pickups. 100 yards should be enough wrap approx. 125 pickups depending on coil size and how tight you wrap the string.