This compact four-step telescoping ladder extends from 18 1/2"L X 12 1/4"W to 45" and sits on top of a swim step.Stainless steel telescoping ladder with 9"W rungs with 7 5/16"W ribbed step pads folds compactly and features an internal "safety stick" feature that helps you slowly lower the ladder into the water while avoiding the possibility of pinching your fingers when collapsing the ladder.Key FeaturesMeasures only 18 1/2"L X 12 1/4"W when fully collapsed and folded flatAttaches to the top of the swim platform; the mounting hole spacing is 10" (254 mm)Requires small backing plate (Model 13090865, sold separately) for installationExtended measurements: 45"L x 12 1/4""W