Spelsberg IP66 Polystyrene Enclosures – Spelsberg 110-402, This IP66 rated, grey (RAL7035) polystyrene enclosure from Spelsberg measures 94 x 65 x 57mm and is designed to insulate and protect electronic components from dust, water and corrosion. Spelsberg 110-402 94 x 65 x 57mm Polystyrene Enclosure