Design: Holscher Design. Frame has a modern, stylish design that is great whether it is used indoors or outdoors. It can be mounted on ceilings and walls. Frame is available in round, square and rectangular shapes in different sizes. Made of die-cast, powder-coated aluminium in black, white or graphite. Flat diffuser made of UV-stabilised opal polycarbonate. Easy to install, two inputs/outputs for cables, with the option for either hidden or visible cabling. 10 year corrosion guarantee, IP66 and IK10.