Upper honeycomb core 25.3mm 3003 Lower honeycomb core 9.5-19.1mm 3003 Bumper honeycomb core 19.1mm 3003 Crush dimension 10±2mm 3003 Base plate 0.8mm 5052H34 Top plate 0.7mm 5052H34 Bumper cover layer 3.0mm 5052H32