LJXH 18mm Hot Runner Heating Elements, Spring Coil Nozzle Band Heaters, 20mm, 3x3 Cross Section, K Thermocou Product Name: sizzling runner coil band heaterInner Diameter: 18mmLength: 20mmCross section: 3x3mmWith thermocouple: Yes, K typeLead Wire: 1m lengthCustom made accepted: YesPackage: 1PC Notice: The picture we reveal here only for reference. After you're making order, the coil band heaters you will get is in step with the dimensions that you order you care about it, please don't make order. Thank you. The runner coil band heaters can personalized accordingly. If you've speical request, please supply us the ensuing information: 1. coil inner diameter2. coil length3. pass section4. with thermocouple or not 5. twine size