Here is the link for the ski: http://www.sportsgearguide.com/scripts/alpineskimoreinfo.asp?ID=247
The arm widths available are 76, 81, 88 and 99mm.
Does anyone have any idea what brake width I need?
Hi and Welcome to Epic!
The ski is listed as having a 74 mm waist, so the 76mm brake should be correct. This is a recommendation from looking at the specs you supplied, not from hands on knowledge. Typically the brake just wants to be wider than the width of the ski at the waist.