8mm safety tempered EasyClean glass, BS EN 12150 & CE certified. This panel can also be used as a front panel or side panel to create an enclosure area. Stone Shower Tray(Optional) You have to leave space for the waste and pipe to run in the floor,so you can not install the tray on a concrete floor.If you want to install the tray on a hard floor,pls buy the riser kit from us.