WindMaster 4604 TALL Slim Curb Sign 18" x 56"The WindMaster Slim Curb Sign with rolling base, Model 4604, is double sided and has PosterGrip side rails that snap open for easy access. Its tall, narrow size is unique and eye catching. 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 the sign is in the upright position, the wheels will disengage. WindMaster Curb