Powerline Preacher Curl Bench. The best exercise for building thick, crowned biceps is without a doubt the bicep curl. This Preacher Curl Bench eliminates cheating and elbow stress while providing perfect isolation to hammer your biceps. Features adjustable seat and extra wide, stable design. Curl Bar, Weights and collars optional Heavy gauge steel construction Electrostatically applied powder coat finish 300 lb. weight capacity Extra-wide seat and arm pads Overall Dimensions: 37"H x 33"L x 36"W Item Weight: 42 lbs.