The SR2319ADAPT Mounting Adapter Kit allows you to mount 19-inch rack equipment in a 23-inch rack. Attach the adapter brackets to the rack's vertical mounting rails using the included hardware. Then, attach 19-inch equipment to the brackets using the included hardware or your own. The cold-rolled steel brackets support a maximum load capacity of 20 lbs (9.1 kgs). Mount 19 in. Rack Equipment in a 23 in. Rack Adapter brackets attach to rack's vertical mounting rails Mounting hardware included Made from cold-rolled steel with black finish Maximum load capacity of 20 lbs (9.1 kgs)