The Optima EH-case features either a HEPA filter on the front door with special gasketing to prevent dust ingress or a solid door with NEMA type gasketing. The swing handle incorporated into the design provides superior gasket compression. Both types can be adapted to meet acceptable EMC requirements. E-cases house EIA 19″ wide subracks and chassis. The modular and stackable design has rigid front and rear aluminum bezels and rounded, extruded aluminum corner members and accommodates a range of configurations with various top, bottom, and side panel options. Accessories for doors, shelves, power, and cooling also are available.