GIR 1 TERMS OF HEADING 8518 INCLUDES LOUDSPEAKERS WHETHER OR NOT MOUNTED IN THEIR ENCLOSURES. GIR 6 TERMS OF ONE-DASH SUBHEADING LOUDSPEAKERS WHETHER OR NOT MOUNTED IN THEIR ENCLOSURES. GIR 6 TERMS OF TWO-DASH S/H 8518.21 SINGLE LOUDSPEAKERS MOUNTED IN THEIR ENCLOSURES. CN CODE 85182190 OTHER THAN FOR USE IN CIVIL AIRCRAFT.