The 979-009-020R121 is a 9-position D-Sub backshell kit from the 979 series. It is constructed from nickel-plated ABS plastic, providing durability and effective shielding. The kit includes two backshell halves, a non-conductive TPR grommet tree, and a full set of nickel-plated steel hardware, including #4-40 screws and nuts. Designed for an operating temperature range of 0°C to +80°C, this RoHS compliant backshell is ideal for providing mechanical strain relief and protection for D-Sub cable assemblies in various electronic applications.