Sigma ProConnex 3/8-in Flexible Die Cast Zinc AC/Mc Connector Conduit Fittings (100-Pack)The Sigma ProConnex AC MC Connectors are used to terminate AC or MC cable to a knockout in a dry location box or enclosure. These die cast connectors are equipped with a tri combo screw and are suitable for aluminum or steel conduit. Terminates AC or MC to a 1 2 in knockout For aluminum or steel 14 2 10 3 AC or 14 2 10 3 MCI and PCS Suitable for dry locations Zinc die cast construction Product is cULus Listed Contractor pack includes 100 pieces per jar