The 518-0920 is a Ventilated Module Instrument Case. Sides include one horizontal row of louvers for ventilation, pre-assembled with a two tone grey powder paint finish. Top is dark satin grey. Bottom, front and back is smooth light grey).
18 Gauge steel base and top for extra strength
4 Self adhesive rubber feet and required hardware
Assembled with 8 machine screws into weld-nuts for repetitive assembly and disassembly