Keep equipment secure and prevent unauthorized access to your servers and networking equipment with this rack mount security cover. This hinged 3U security panel is perforated to allow for airflow without compromising on security, preventing heat-related damage to equipment. With a sturdy steel construction, this 19" slotted hole server rack cage can be used over and over again in many applications. This rack mount security cabinet with a key is TAA compliant for GSA Schedule purchases. StarTech.com offers a 3-year warranty and free lifetime technical support on these hinged 3U security doors.