The Extreme Networks Avaya 4900 / 3500 Series 1U Rack Mount Ears Kit (Model: AL3511001) is a set of two ears designed for mounting 1U rack-mountable networking equipment. Made by Extreme Networks in the United States, this kit provides a secure and stable way to install switches and hubs in a professional networking environment. The rack mount ears ensure that the equipment is securely held in place, allowing for organized and efficient cable management within the networking setup.