Mounting Bracket Set Cavity Width 2.6 in Cavity Height 0.7 in Height 0.9 in Outside Width 3.0 in Link to Link Pitch 0.98 in /24.9mm Mounting Brackets Included Yes Crossbar Material Plastic For Use With 2ACA8 2ACA9 2ATE2 2ATE3 Style Open Type Uniflex(TM) Fiber Reinforced Nylon Accessory Height 0.9 in Accessory Material Plastic Accessory Width 3.0 in