Rocket Motor, Liquid Fuel, Apollo Service Module Reaction Control System (RCS)

Nozzle, with equidistant ribs around it; nozzle, sniny but tarnished sillver metal; combustion chamber and upper half of nozzle above nozzle, on top; nozzle injector head on top of combustion chamber; oxidizer valve, short cylinder, on top of this, with green manufacturer's plate around side; fuel valve, another short cylinder, projecting at angle from side of injector head, with red manufacturer's plate around its periphery; wire bundle, insulated with red, blue, and transparent plastic inslation, leading from solenoid valve within injector unit.