004 Buna-N Backup Ring, 90A Durometer, 0.096" ID, 0.053" Thick, Black (Pack of 100)
</br></br>
<div style="text-align:left">
<b>[Product Information]</b><br>
<ul>
<li>Contoured Backup Ring made of Buna-N (Nitrile, NBR) for use with a variety of fluids and hydrocarbons</li>
<li>Durometer (hardness) of 90A</li>
<li>For use across a wide temperature range from -40 degrees F (-40 degrees C) to 212 degrees F (100 degrees C)</li>
<li>Backup Rings provide added extrusion resistance in high pressure sealing situations</li>
<li>1 or 2 Backup Rings can be used per 1 O-ring, depending on the direction of  pressure in the sealing application</li>
</ul>
</div>
</br></br></br></br></br></br></br></br></br></br>

</br></br></br></br></br></br></br></br></br></br>
<img src='http://ecx.images-amazon.com/images/I/315tEFBuZ7L.jpg'></br>