Uniview Tec UVT LB3L NVR Lockboxes New Tools & Accessories The cavity is completely open The cavity is completely open which means the 4800F allows for a full 3 4" depth and upto a 1" throw with the included two (2) 1 16" spacer plates competitor backplates do not allow for this versatility DH X88B5S6 Spec Sheet Designed to Provide Security and Protection for Recorder while at the same time providing Ventilation for Optimum and Efficient OperationTwo Sizes Offered to Accommodate virtually all Recorder sizesRemovable Top Lid for Easy Access and Installation of EquipmentKeyed Lock on Front Door Permits Controlled Access to Front of RecorderManufactured of Tough Electrolytic Galvanized IronRack Mount Brackets Included Maximum Load Capacity 30lb (13