hotspring Coil Heaters | hotcontrol Thermocouples and RTDs
http://www.plastics-technology.com/company/primari-plastics-processing-machinery-auxiliary-equipment
Since then further innovations have been made: hotspring coil heater/Mini (type WRP 1.3 x 2.3), flat and square, hotspring coil heater/Maxi (type WRP 4.8 x 8.6).