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| Commodity | 2005 | 2006 | 2007 | 2008 |
| Cast tube/pipe fittings (e.g., couplings, elbows, sleeves) of non-malleable ... | $12,668 | $31 | $5,098 | $19,002 |
| Cast tube/pipe fittings (e.g., couplings, elbows, sleeves) of iron (excl. n ... | $70,995 | $60,772 | $80,390 | $72,097 |
| Flanges of stainless steel | $4,222 | $14,993 | $10,995 | $34,331 |
| Threaded elbows, bends & sleeves of stainless steel | $17,609 | $8,992 | $48,254 | $15,155 |
| Butt welding fittings of stainless steel | $925 | $1,532 | $1,391 | $51,660 |
| Tube/pipe fittings of stainless steel (excl. of 7307.21-7307.23) | $113,136 | $71,371 | $110,005 | $294,184 |
| Flanges of iron/steel (excl. of cast iron/stainless steel) | $8,353 | $1,736 | $754 | $21,707 |
| Threaded elbows, bends & sleeves of iron/steel (excl. of cast iron/stainles ... | $7,157 | $4,006 | $38,596 | $26,577 |
| Butt welding fittings of iron/steel (excl. of cast iron/stainless steel) | $2,385 | $2,408 | $1,286 | $4,449 |
| Tube/pipe fittings of iron/steel (excl. cast iron/stainless steel; excl. of ... | $658,478 | $332,895 | $741,141 | $373,993 |
| Total | $895,928 | $498,736 | $1,037,910 | $913,155 |
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