The Elegant Double Sliding Shower Door 46.5 in.- 48 in. W x 72 in. H in Black Finish.Crafted from prime quality aluminum, this door is built to last. The clear tempered glass is 1/4 inch thick and ANSI Z97.1 certified, ensuring safety and easy maintenance. The door can be installed on either the left or right side, and the width can be adjusted up to 1.5 inches by cutting the top and bottom rail.Professional installation is recommended.