The Optum 48x24 Desk Top features a two-sided top design that lets you choose from gray or white with a 3mm gray edge band. The commercial-grade, ANSI-BIFMA approved work surface is water, scratch and stain-resistant. Other sizes and colors are also available. NOTE: The top will attach to the base with screws, so it's no longer reversible after it's been assembled. Designed for use with an Optum Desk Base, or use it with a base that you already have.