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The balance of trade (or net exports, sometimes symbolized as NX) is the difference between the monetary value of exports and imports of output in an economy over a certain period. It is the relationship between a nation's imports and exports.[1] A positive or favorable balance of trade is known as a trade surplus if it consists of exporting more than is imported; a negative or unfavorable balance is referred to as a trade deficit or, informally, a trade gap. The balance of trade is sometimes divided into a goods and a services balance.
The balance of trade forms part of the current account, which includes other transactions such as income from the international investment position as well as international aid. If the current account is in surplus, the country's net international asset position increases correspondingly. Equally, a deficit decreases the net international asset position.
The trade balance is identical to the difference between a country's output and its domestic demand (the difference between what goods a country produces and how many goods it buys from abroad; this does not include money re-spent on foreign stock, nor does it factor in the concept of importing goods to produce for the domestic market).
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 22334E NACHI | 170 | 360 | 120 |
| 23234A2X NACHI | 170 | 310 | 110 |