Vertical D-ring. Outside dimensions 3.26-Inch L x 3.30-Inch Width (82.8mm x 83.8mm). Patented cable manager ring. Standard EIA hole spacing allows product to be mounted to any standard rack. Flexible material allows arm to rotate so entire cable bundle can be inserted and removed. Rounded edges prevent damage to cable insulation. 1/4-Inch (M6) mounting hole allows for a variety of screws to secure the D-ring to a surface. Create a structured pathway and allows for open access. Material: Black Flame Retardant Polycarbonate. Panduit is a world-class manufacturer committed to innovation and excellence. Today, Panduit is recognized as a leading manufacturer of high-quality products for wiring and communications applications. This reputation gives the company a powerful advantage in today"s competitive worldwide marketplace.