d></td>
</tr>
<tr>
<td>1 1/4</td>
<td>1.0670</td>
<td>7</td>
<td>0.1429</td>
<td></td>
</tr>
<tr>
<td>1 1/2</td>
<td>1.2866</td>
<td>6</td>
<td>0.1667</td>
<td></td>
</tr>
<tr>
<td>1 3/4</td>
<td>1.4939</td>
<td>5</td>
<td>0.2</td>
<td></td>
</tr>
<tr>
<td>2</td>
<td>1.7154</td>
<td>4.5</td>
<td>0.2222</td>
<td></td>
</tr>
<tr>
<td>2 1/2</td>
<td>2.180</td>
<td>4</td>
<td>0.250</td>
</tr>
</table>
<h2><span class="mw-headline" id="Current_Usage">Current Usage</span></h2>
<p>The widely used (except in the U.