If you selected an Angled Console Box in Step 3, the only compatible Top Plate will be the 29" version. If you selected a Standard Console Box, you may select either the 23" or the 29" Top Plate.
RAM® 23" Top Plate for RAM® Tough-Box™ Consoles
RAM-VC-TP-23
$77.49
RAM® 29" Top Plate for RAM® Tough-Box™ Consoles
RAM-VC-TP-29
$92.99