LJXH 18mm Hot Runner Heating Elements, Spring Coil Nozzle Band Heaters, 20mm, 3x3 Cross Section, K Thermocou Product Name: scorching runner coil band heaterInner Diameter: 18mmLength: 20mmCross section: 3x3mmWith thermocouple: Yes, K typeLead Wire: 1m lengthCustom made accepted: YesPackage: 1PC Notice: The picture we demonstrate here only for reference. After you are making order, the coil band heaters you'll get is according to the scale that you just order you care about it, please do not make order. Thank you. The runner coil band heaters can custom-made accordingly. If you've speical request, please provide us the ensuing information: 1. coil internal diameter2. coil length3. pass section4. with thermocouple or now not 5. cord length