... and fixing on electrical wire 3.E14 lamp bulb 300Celsius Product name: Ceramic lampholderLampholder: Porcelain, 2/250, T300Lens: 41mm, hard glass, 300CelsiusSleeve ... .Reliable operation at medium oven temperatures (up to 300°C) Product Certificates: TUV,CE,UL, Up to standards of RoHS