Acero Series - Tub assembly Inspired by the minimal use of metal and precision crafted design of our Matrix Series, the Acero frameless, shower enclosure offers a clean, Architectural statement ideal for any transitional or contemporary bath setting. With built-in adjustability to fit almost any wall condition and a range of glass sizes available, the Acero will complement your bath and stall opening. Acero is constructed with durable, stainless steel hardware combined with 3/8" optimum clear (low-iron), tempered glass that is protected with EnduroShield glass coating. A truly frameless, sliding door is supported by a rectangular stainless steel rail eliminating the typical header. Two machined stainless steel rollers allow you to effortlessly operate the enclosure. Finish choices include Brushed Stainless Steel and High Polished Stainless Steel.