SD Series Wire Marker, up to 1 inch wire

This is the original model of the Spherical Power Line Marker, and still the most popular and economical. It was designed in the 1960's in cooperation with the Arkansas Department of Aeronautics and the Arkansas Division of the Federal Aviation Administration. It has remained in continuous production, with only minor changes, since its introduction.

This marker installs easily on any wire 1/8" - 1" (Custom wire sizes are available) through the use of two UV resistant neoprene strip bushings installed on the wire to match the diameter of the openings (boss) in the marker. The marker is then securely bolted around the wire, clamping down on the bushings.

This marker is appropriate for neutral wires, guy wires, and conductor wires up to 69KV only.