25 Dry Erase Magnetic Shelf Labels 2" x 4" - White - 20 mil - Write On/Wipe Off 25 - 2" X 4" Magnetic Strips with White Dry Erase Front and Black Magnetic Back 20 mil in thickness Wipes clean when using dry erase markers Don't be confused by competitors selling regular sign vinyl strip magnets as dry erase. Before you buy - make sure it is a dry erase product Made in USA