Displays2go 30" x 40" Double Sided Sidewalk Sign with Fillable Base and Springs &ndash; Black (PSSS3040BK) Holds two 30 x 40 inch prints to create a double-sided presentation. Water-fill base and spring connectors ensure a stable fixture, even in inclement weather. Snap-open poster frame simplifies the process of updating signage. Built-in wheels allow for easy repositioning, even when the base is filled. Double sided design