These covers for the open holes of the suspension mounting are made of aluminium and available in silver anodized. These 2 covers will be installed on the left and right side. An expansion fastener will hold them perfectly in place.
Shipping contains a set (2 pieces).
When mounting the red or blue aluminium covers, you need to put some oil on the screw head, so that the lacquer is not damaged when screw is tightened (see also installation instruction and installation video).