27131100 -- Not calcined
28342940 --- Of copper
71132000 - Of base metal clad with precious metal
61124910 --- Containing by weight 5?% or more of rubber thread
52053200 -- Measuring per single yarn less than 714,29?decitex but not less than 232,56?decitex (exceeding 14?metric number but not exceeding 43?metric number per single yarn)