6061 Forged Alloy. Made to O.E.M. specifications. Correct hardness to reduce damage to frame upon impact. Includes mounting bolt. Fits some Cannondale. NOTE: 14.33mm between the two holes (center to center) and 6.81mm between the two vertical plates. Compatibility:. Cannondale: 1991-2006 Mountain / Adventure 600 - 2007 / 29`er 1 - 2009 / 29`er 4 - 2009 / A239X EBO - 2007 / Adventure 1000 - 2007 / Adventure 1000 Feminine - 2007 / Adventure 400 - 2007 / Adventure 400 Feminine - 2007 / Adventure 600 Feminine - 2007 / CAAD2 - 2007 / CAAD3 - 2007 / CAAD4 - 2007 / CA