DS EN 4165-018:2007 Aerospace Series - Connectors, Electrical, Rectangular, Modular Operating Temperature 175 Degrees C Continuous - Part 018: Protective Cover For Receptacle 2 And 4 Modules, Series 2 And Series 3 Product Standard Describes the protective cover for receptacle 2 and 4 modules, series 2 and series 3 used in the family of rectangular electrical connectors.