The best exercise for building thick crowned biceps is the bicep curl. The PPB32X Preacher Curl Bench eliminates cheating and elbow stress while providing perfect isolation to hammer your biceps. Features adjustable seat and extra-wide stable design. Extra-wide seat and arm pads Isolates your biceps 300 lb. weight capacity Dimensions: 37 H x 33 L x 36 W Curl Bar Weights and collars optional Weight: 47 lbs