Middle Atlantic 3RU Fixed Security Cover with Hinged Plexi DoorLock down critical equipment with the Middle Atlantic SECL Series 3RU Fixed Security Cover with Hinged Plexi Door. engineered for reliability and security, this cover blends a rugged steel frame with a discreet, smoked gray plexiglass door that is both see through and tamper resistant. Designed for 3 rack unit (3RU) installations, it provides a compact, professional solution to protect valuable gear from dust, tampering, and unauthorized access while