ABOUT THE MAINSTREAM COLLECTION — Give your bathroom a fresh update with Mainstream shower options. The collection includes a 32-inch shower door, coordinating wall system and shower base, each sold separately. Choose only the pieces you need or plan a complete shower makeover that’s easy and affordable. The Mainstream Alcove Shower Wall Set from American Standard brightens your shower with the crisp, clean look of Arctic White. Ideal for a 32-inch shower, the Mainstream wall set is an easy-to-install, glue-up system that adheres directly to greenboard. Smooth surface is easy to wipe clean and eliminates the care and maintenance of traditional tile grout. Featuring built-in shelves, it’s the perfect combination of easy care and convenience. Add the coordinating Mainstream shower door and base, each sold separately, for a complete update.