A1 Silver A-Board Double Sided Pavement Sign Poster DisplayThe A frame is the most enduring pavement sign format for a reason: it works without any of the infrastructure that other sign types demand. No waterbase to fill and empty each day. No wheels to maintain. No spring mechanism to adjust. No assembly beyond opening the hinged frame. The two panels lean against each other at a fixed angle, the weight of the aluminium frame provides its own stability, and the wide stance distributes the load across the