120m. Couloir to the right of Col de Floria on the Index side of the Petit Aiguille de Floria. Not recommended for ascent (quite chossy) - Eperon des Monchus is a recommended alternative. Considered to be the standard descent from the summit, but possibly not fully equipped (no fixed gear but some slings at time of writing, July 2013).
In descent, from the summit scramble 50m down the west ridge to the top of the couloir. Make 2 abseils (25m each) down the couloir. Scramble R (facing in) for 10m to a large flake, and make a final 25m abseil down onto snow.