Features: 1. Operation temperature: 1500? (1600? for short time). 2. Maximum energy efficiency is achieved by surrounding the chamber with thermal-efficient alumina fiber ceramic insulation. 3. Heavy duty double layer structure with cooling fan. Lower teperature in outside case. 4. Pid automatic control via current limiting phase angle fired the resistor, e.G. Scr(silicon controlled rectifier). 5. Power control with 30 segments programmable. Descriptions: Chamber sizeF60x300mm (2.5"x12") Working temperature1500? (continuous) Maximum temperature1600? Temperature control30 steps programmable and pid automatic control Heating rate0~15?/min (suggestion: =10?) Temperature accuracy+/-1? Heating elementMolybdenum disilicide (mosi2) Working voltageAc 220v, single phase, 60/50 hz (or according to your requirement) Max. Power4 kw Net weight70 kgnote: there are different chamber(tube) sizes for your choice.