The 3357-9225 is a 25-position metal EMI junction shell designed to provide robust EMI/ESD protection for D-Sub connectors, similar to aluminum die-cast shells. It is constructed from nickel-plated steel with a black, UL 94V-0 rated thermoplastic ABS cover nut. The lightweight, compact design is engineered for easy assembly, which helps reduce labor time and lower applied costs. This shell is ideal for applications requiring reliable grounding and shielding for discrete wire connections.