This shower door is made from ANSI Z97.1 and SGCC-certified clear easy-cleaning treated tempered glass and all the hardware passes 48 hours acid-spray testing, a rust-free finish guaranteed, our Innovatively designed roller blocking system will capture the sliding panels with neither bounce-back nor bumper stops. It is keepable the width of in other selections, definitely the largest span bypass sliding shower door in the industry standard. Besides full-length clear seal strips for sliding door panels, we also offer a bottom metal water deflector that redirects water within the shower space. This door passes the 100,000 sliding operation test, which gives you complete durability.