The Bobrick B1658 1830 is a tempered glass channel frame. This model has the dimensions of 18" W x 30" H (46 x 76cm). The channel frame is made of type 430 stainless steel and has a brightpolished finish. Frame screws allow for the glass to be replaced easily.Theftresistant mounting secures mirror to concealed wall hanger. Tempered glass mirrors protect the glass from breaking, providing additional safety. They also have a slightly different reflective quality and color. The tempered glass mirror might have heatgenerated markings and modest distortion, which are normal for this type of glass.