This frameless single sliding shower door is made from 3/8" ANSI Z97.1 and SGCC (Safety Glazing Certification Council) certified clear easy-cleaning treated tempered glass and all the hardware passes 48 hours acid-spray testing, a rust-free finish guaranteed. This shower door has top rail support that ensures wall anchoring and reinforces wall stability. The heavy-duty top rail is made from stainless steel to withstand more than the required weight. Our innovatively designed Anti-collision system can capture the sliding door panels in position, no more bounce back, This door passes the 100,000 sliding operation test, which gives you complete durability.