The M902-2191 is a backshell accessory designed for DEUTSCH HD10 series 9-cavity connectors (HD1*-9-96*/HD1*-9-1939**). It accommodates cable diameters from 0.187 to 0.300 inches and features a threaded screw-on design that mates with compression nut M902-2041. Constructed from PC/PET polyester blend material with UV stabilization and flame retardancy, the backshell is rated for operating temperatures from -40°C to +134°C and meets UL94-VO flammability and UL746C weatherability standards. The rigid, durable design provides high-level cable protection, strain relief, and improved connector aesthetics for industrial and commercial transportation applications.