StrongHold JP4CMB-X20 J-Hook with Ceiling Mount Bracket 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. Has one 3/16” (M5), 1/4” (M6), and 3/8” (M10) mounting hole, 4.00” (101.6mm) max. Made of Nylon 6.6, are black in color, and come in packages of 10.