Our shower enclosures are made of tempered glass which is hardened at very high temperature. After this treatment, the product can not be drilled, trimmed or shaped any more. Every shower enclosure, which is made of tempered glass, must have the product conformity mark that proves the quality of the glass, e.g. that the shower enclosure is made of tempered glass. According to all European standards, shower enclosers without the conformity mark are unsafe to use. Tempered glass is hard to break, but if it does, it does not leave dangerous sharp points that could injure you.