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| Commodity | 2005 | 2006 | 2007 | 2008 |
| Cast tube/pipe fittings (e.g., couplings, elbows, sleeves) of non-malleable ... | $52 | $160 | $13,169 | $81,888 |
| Cast tube/pipe fittings (e.g., couplings, elbows, sleeves) of iron (excl. n ... | $131,678 | $47,417 | $75,799 | $135,968 |
| Flanges of stainless steel | $4,367 | $18,525 | $13,764 | $22,068 |
| Threaded elbows, bends & sleeves of stainless steel | $3,980 | $26,557 | $21,468 | $18,772 |
| Butt welding fittings of stainless steel | $46 | | | |
| Tube/pipe fittings of stainless steel (excl. of 7307.21-7307.23) | $1,042,121 | $801,904 | $693,357 | $510,944 |
| Flanges of iron/steel (excl. of cast iron/stainless steel) | $21,602 | $28,553 | $14,286 | $18,383 |
| Threaded elbows, bends & sleeves of iron/steel (excl. of cast iron/stainles ... | $90,584 | $42,955 | $26,738 | $31,226 |
| Butt welding fittings of iron/steel (excl. of cast iron/stainless steel) | $7,759 | $7,621 | $37,416 | $1,199 |
| Tube/pipe fittings of iron/steel (excl. cast iron/stainless steel; excl. of ... | $66,319 | $99,749 | $97,852 | $126,371 |
| Total | $1,368,508 | $1,073,441 | $993,849 | $946,819 |
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