China 6X20mm heating tube 12V/24V 40W heating pipe Cartridge Heater for 3D Printer Prusa Mendel extruder with Stainless steel hose, Find details about China Single-Head, Small Heater from 6X20mm heating tube 12V/24V 40W heating pipe Cartridge Heater for 3D Printer Prusa Mendel extruder with Stainless steel hose