Panduit JP4DW-X20 J-Hook with Drop Wire and Rod Clip has a patented design, featuring complete horizontal and vertical 1" bend radius control, which prevents pinch points and degradation of cable performance. They are suitable for use in air handling spaces and are UL listed. For use with #12 wire and threaded rod up to 3/8" (9.5mm) in diameter or 1/8" - 7/16" (3.2mm-11.1mm), 4.0" (101.6mm) max. bundle capacity. Made of Nylon 6.6, are black in color, and come in packages of 50.