AC/MC Cable Support, Polypropylene
https://dev.nsiindustries.com/product/ac-mc-cable-support-polypropylene/
Bridgeport’s Polypropylene Cable Support is used to position nonmetallic and low voltage cables in each of three rectangular slots. Comes with grooved nail (for extra gripping) and can be mounted to wood studs or 3/4″ thick furring strips. Patented.