we can supply coi heater Here are brief introduction of our company: Haishi Electric Heating Element Limited Company is mainly produce various electrical heating element between ф2mm-ф500mm(cartridge heaters,coil heaters,band heaters,hot runner heaters,etc) .We are managed with science,own a team of enormous experts of technology and well-trained workers. 1) Ni-Cr alloyed metal as heating element. 2) Round, square and rectangular cross sections. 3) Dimensions ( cross sections in mm) Square: 3x3mm 3.5x3.5mm 4x4mm Round: 3mm 4mm 5mm Rectangular: 4x2mm 4) Rated Voltage: 220V, 230V,