special design for Hot runner, the section with 3*3,3.3*3.3,3.5*3.5,4*2,4.2*2.2,4*4,6*6,power densit . special design for Hot runner, the section with 3*3,3.3*3.3,3.5*3.5,4*2,4.2*2.2,4*4,6*6,powerdensity 6-7W/CM2,the type K or J thermocouple available . Special Design Heaters