<B>397 Piece Metric O-Ring Assortment with Storage Case and O-ring Gauge Review</b><P>http://tinyurl.com/ppqq2ty <P><P> 397 Piece Metric O-Ring Assortment with Storage Case and O-ring Gauge <P>Nitrile rubber construction<P>Resists oils, hydraulic fluid and water<P>Includes poly storage case with O-ring gauge<P>Weight: 1.35 lb.<P>