Windmaster 4104 Rolling Base Frame for 22x28" postersWindMaster V4 Curb Sign with rolling base, Model 4104, is double sided and has PosterGrip side rails that snap open for easy access. The distinctive round corners add style and also eliminate corner points. The top is completely enclosed for added moisture resistance. The molded base can be weighed with water and is equipped with two built in wheels. The wheels will engage when the sign is tilted to allow for it to be easily rolled into position. When