Optional Tool-Free Lever Lock accommodates small devices including encoders power supplies and access control systems. - Optimized for Security - Designed for IP, Analog and Hybrid installations - Includes Lever Lock system for efficient mounting of small devices - Non-propriety "Zero-U" mounting for additional capacity - Supports both Active and Passive Ventilation - Works in equipment rooms or data centers - Fan tops and rear fan doors are available - Features Enhanced Cable Management - Unique cabinet to cabinet cable pass throughs - Large bottom opening 70 percent open area split rear door Solid top with brush cable pass-through