Vantech Ladder Stopper for H2.1 Series Model A57BVantech Ladder Stopper for H2. 1 Series Model A57B The Vantech Ladder Stopper blocks the ladder and other materials from moving forward. the top of the ladder stopper is coated with rubber to prevent damage to equipment. There is a bend at the tip of the Ladder Stopper to better hold down the ladder and prevent rattling. Best used in combination with hook & loop straps to easily secure ladders onto your vehicle.