Aston Orbitus 40" x 40" x 75" Completely Frameless Round Sliding Shower Enclosure with Left Hand Opening, Polished Chrome Completely frameless 39" x 39" round bypass sliding shower door enclosure, left opening Modern, Elegant 4-Wheeled Roller System for Easy, Smooth and Flawless Opening Premium Clear 5/16" (8mm) Tempered Safety Glass - ANSI Z97.1 Certified Deluxe clear seal strips prevent leakage and compliments completely frameless design 2.5" Low-Profile Acrylic Fiberglass Base Not Included