Cartridge Heaters Electric heaters for a variety of heating equipment Cartridge HeatersFeatures: 1) Materials: quality stainless steel, high purity MgO powder andNiCr metal 2) Rated voltage: a) 240 Vb) 230 Vc) 110 V3) Diameter: 4mm, 5mm, 6mm, 6.5mm and up4) Type k and J thermocouples can be attached . Cartridge Heater