The V Style Rack Mounting Shelf is designed to mount up to two NMX-ENC H.264 Encoders side-by-side in a single rack unit. It is also compatible with Enzo¨ when Enzo is combined with NMX-MM-RKA Enzo Rack Mount Adapter, and is compatible with …Solecis Digital Media Switchers. The rack shelf ships with one fill plate and rack-mounting screws.