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| Commodity | 2005 | 2006 | 2007 | 2008 |
| Cast tube/pipe fittings (e.g., couplings, elbows, sleeves) of non-malleable ... | $27,548 | $320,653 | $8,013 | $1,584 |
| Cast tube/pipe fittings (e.g., couplings, elbows, sleeves) of iron (excl. n ... | $450,194 | $359,144 | $250,674 | $434,697 |
| Flanges of stainless steel | $131,620 | $333,616 | $627,114 | $619,350 |
| Threaded elbows, bends & sleeves of stainless steel | $74,629 | $135,420 | $279,757 | $249,993 |
| Butt welding fittings of stainless steel | $43,121 | $15,375 | $56,220 | $30,005 |
| Tube/pipe fittings of stainless steel (excl. of 7307.21-7307.23) | $282,219 | $350,631 | $263,346 | $220,432 |
| Flanges of iron/steel (excl. of cast iron/stainless steel) | $78,751 | $63,288 | $71,437 | $70,886 |
| Threaded elbows, bends & sleeves of iron/steel (excl. of cast iron/stainles ... | $23,855 | $40,766 | $32,366 | $19,476 |
| Butt welding fittings of iron/steel (excl. of cast iron/stainless steel) | $1,620 | $13,466 | $23,960 | $38,224 |
| Tube/pipe fittings of iron/steel (excl. cast iron/stainless steel; excl. of ... | $1,301,208 | $1,172,523 | $1,751,936 | $1,557,372 |
| Total | $2,414,765 | $2,804,882 | $3,364,823 | $3,242,019 |
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