| 2516.90.00 | 30 | Having a thickness of 7.5 cm or more | t |  |  |  | 
| 2517 |  | Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling, or for railway or other ballast; shingle and flint, whether or not heat-treated; macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in the first part of the heading; tarred macadam; granules, chippings and powder, of stones of heading 2515 or 2516, whether or not heat-treated: |  |  |  |  | 
| 2517.10.00 |  | Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling, or for railway or other ballast, shingle and flint, whether or not heat-treated |  | Free |  | 30% | 
| 2517.10.00 | 15 | Pebbles and gravel | t |  |  |  | 
| 2517.10.00 | 20 | Limestone, except pebbles and gravel | t |  |  |  | 
| 2524.90.00 | 40 | Milled fibers, group 3 grades (spinning fibers or equivalent) | t |  |  |  | 
| 2530.10.00 | 00 | Vermiculite, perlite and chlorites, unexpanded | kg | Free |  | Free | 
| 2603.00.00 | 40 | Silver content | Ag g |  |  |  | 
| 2607.00.00 | 40 | Silver content | Ag g |  |  |  | 
| 2608.00.00 | 40 | Silver content | Ag g |  |  |  | 
| 2610.00.00 | 20 | Having a chromium content equivalent to not more than 40 percent chromic oxide (Cr2O3) | t Cr2O3 t |  |  |  | 
| 2610.00.00 | 40 | Having a chromium content equivalent to more than 40 percent but less than 46 percent chromic oxide (Cr2O3) | t Cr2O3 t |  |  |  | 
| 2610.00.00 | 60 | Having a chromium content equivalent to 46 percent or more chromic oxide (Cr2O3) | t Cr2O3 t |  |  |  | 
| 2615 |  | Niobium (columbium), tantalum, vanadium or zirconium ores and concentrates: |  |  |  |  | 
| 2615.90.60 | 90 | Vanadium ores and concentrates | kg V2O5 kg |  |  |  | 
| 2616.10.00 |  | Silver ores and concentrates |  | 0.8¢/kg on lead content | Free (A+,AU,BH, CA,CL,D,E,IL,J, JO,MA,MX, P,SG) | 8.8¢/kg on copper content +  3.3¢/kg on lead content +  3.7¢/kg on zinc content | 
| 2616.10.00 | 40 | Silver content | Ag g |  |  |  | 
| 2620.19.60 | 40 | Silver content | Ag g |  |  |  | 
| 2620.21.00 | 40 | Silver content | Ag g |  |  |  | 
| 2620.29.00 | 40 | Silver content | Ag g |  |  |  | 
| 2620.30.00 | 40 | Silver content | Ag g |  |  |  | 
| 2620.40.00 | 30 | Vanadium bearing materials | kg V2O5 kg |  |  |  | 
| 2620.99.10 | 00 | Containing mainly vanadium | kg V2O5 kg | Free |  | Free | 
| 2620.99.30 | 00 | Materials not provided for elsewhere in this heading containing by weight over 10 percent nickel | kg Ni kg | Free |  | Free | 
| 2620.99.50 | 00 | Slag containing by weight over 40 percent titanium, and which if containing over 2 percent by weight of copper, lead, or zinc is not to be treated for the recovery thereof | kg | Free |  | Free |