<table border="1" cellspacing="0" cellpadding="8"><tbody><tr><td>Application</td><td>vacuum industry</td><td>Chemical Composition</td><td>Cu or others</td></tr><tr><td>Material</td><td>copper or others</td><td>Shape</td><td>O shape</td></tr><tr><td>Product name</td><td>Oxygen free copper seal</td><td>Application</td><td>Vacuum industry accessories</td></tr><tr><td>Sample</td><td>Free</td><td>Delivery time</td><td>7-15 days</td></tr></tbody></table>