The ZyPer Rack Assembly is a 19" x 5U or 6U space that is designed to hold eight or ten ZyPer encoders or decoders using the included carrier units. (ZyPer4K = 8 units, ZyPerHD and ZyPerUHD = 10 units) The Rack Assembly is flexible and allows devices to be mounted facing forward or backward depending upon your connection requirements. Each carrier unit features an L-bracket and 3 countersink screws for a reliable and secure installation.