These trombone link chains are super rare and impossibly hard to find! This one has a single dog clip which is always good for dangling charms or adding an extension. It is 16 inches and every link is hallmarked with a 9.375 as well as the oval cable link. Sponsor mark is V.H.M. The individual trombone link measure 20mm long by 5mm wide The Tbar measures 35mm. A real beauty.