Guardian Industrial Products dock bumpers are built strong to absorb collision impacts while effectively protecting both truck trailer equipment and warehouse or loading dock structures. Each dock bumper is designed for vertical installation measuring 11in x 24in x 4.5in overall constructed with several layers of laminated rubber bolted together with a heavy duty steel mounting bracket. The stacked rubber transfers an impact forces across the layers to disperse energy more efficiently than a solid rubber block. Brackets on each side feature 3/4in mounting holes for securing to walls and loading docks. Great for both outdoor or indoor industrial applications.