<strong>Yahoo Message Number: 66366</strong>There is a vinyl extrusion that covers the mating sections of the front and end caps to the body walls. It snaps onto an aluminum extrusion which is fastened all along the joint and acts as the base to which the vinyl U shaped extrusion is pressed onto. <br/>I had the misfortune of getting to close to a rockery as I was backing up and popped off...