30 x 40 Outdoor Sidewalk Sign with Water-Fill Base and Snap-Open Frame, Double-Sided - Silver Water-fill base balances the fixture against high winds; spring connectors for wind resistance. Snap-open poster frames simplify the process of updating 30 by 40 inch signage. Base includes wheels to make repositioning the unit a simple task; built-in handle is easy to grab. Double-sided display captures the attention of those coming and going from your business. Displays2go SKU#: PSS3040GR