New from ICAST 2013 Shimano incorporated their latest CI4+ material into a new low profile reel - the outcome is their brand new Chronarch CI4+. The new Chronarch CI4+ is a much more rigid version of the original CI4 material introduced in 2009 in Shimano's Stradic CI4 models. This was first used for the Magnumlite rotor on the Sustain FG model spinning reels. The lightweight carbon offers the angler reduced weight, compact size and corrosion proof properties. As with most composites, technology improves and they were able to make this material 200% stronger.