1.Diameter: according the requests. 2.Voltage: 110V, 220V, 380V 3.material: according to requests. 4.power: according request Detailed Description 1) Diameter: we can manufacture various diameter for cartridge heater2) Voltage: 110V, 220V, 380V3) Sheath material: steel, SS304, SS316, Incoloy8004) Power: 150 - 1,500W Coil Heaters