<table border="1" cellspacing="0" cellpadding="8"><tbody><tr><td>Pipe Class</td><td>Not Rated</td><td>Surface Treatment</td><td>Polishing</td></tr><tr><td>Technic</td><td>Machining</td><td>shape</td><td>Round</td></tr><tr><td>System of Measurement</td><td>Metric</td><td>head code</td><td>Hexagon</td></tr><tr><td>Mounting hole diameter</td><td>0.25 in</td><td>customized support</td><td>yes</td></tr></tbody></table>