These non-conductive fiberglass rods can be screwed together to form longer lengths for running wire through walls, attics, crawl spaces, sub-floors, and suspended ceilings.

SPECIFICATIONS
For running wire through walls, attics, crawl spaces, sub-floors and suspended ceilings
Great for installing cable
Includes (1.05M) 10 rods with threaded brass connectors, 4mm flexible acrylic connection, brass push and pull rods
Rods connect for extension up to 10.5M.
Comes with plastic storage case
Fiberglass rod diameter is 4MM