Breakaway Hinge Type; Protects Against Damage If The Ladder Is Inadvertently Left In The Down Position While Underway; 3 Inch Width x 3-3/4 Inch Height x 3-1/4 Inch Depth; Stainless Steel; Single; Compatible With Models 19802/ 19803/ 19804/ 19833/ 19834/ 19843/ 19844/ 19812 Sport Diver Dock Ladders