Class l only, for mounting Conductor and Air Terminal on horizontal or vertical surfaces. Mounts with screws, drive-in anchors, or bolts. Accepts Flat Conductor from sizes 1” X 1/8” (25x3mm) to 1” X 1/4” (25X6mm). Can also accept up to two (2) Flat Conductors 1” X 1/8” to make a T or Cross Run Connection. May be fitted with metric threads if desired.