HydroTools by Swimline Molded Pool Ladder Step<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Outside Length: 19-5/8 inches， Inside length: 17.75 inches</li><li>End Width: 3.25 inches， Center Width: 4.75 inches， Rail opening: 2-1/8 inches</li><li>Designed for use on 1.9 inch O.D. ladder rails</li><li>Bolt kit sold separately</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31cbKf7y6kL.jpg" noproxy>