... steam lampLampholder: common Porcelain, 2/250, T300Lens:41mm,Hard glass, 300 CelsiusSleeve: Stainless steel, Ni-plate steel, complex material plate steelLamp ... Bulb: E14, Coiled-coil filament, 300 CelsiusAsccessory material:silica gasket ,protect steam from entering the lamp ... oven temperatures (up to 250C) Product Certificates: TUV,CE,UL, Up to standards of RoHS