Andersen Hitches Clean Step Mat - 3607 Keep 90% of the dirt outside of your RV, Trailer or Home with the innovative Clean Step from Andersen. Unique ridges work hard to remove dirt, mud and grease! Each Clean Step is extremely strong and easy to clean - just rinse with water! Dimensions: 11 x 1.75 x 21. Built to last Proudly made in the USA