Hotend is equipped with NTC3950 thermistors, 24V 40W heater, 24V fan 24V powered V6 hotend can be used as upgrade to 3d printers with 24V power supplies, as as for DIY projects. NTC 3950 Thermistor parameters: Use TEMP Sensor number 11 in firmware. Small Size: 1.25mmx2.0mm glass bead. High accuracy: 1%. Resistance value at 25C=100K. Wiring insulation: high temperature /. Wiring length: 1 meter. Color as shown material: metal Package Contents: 1 x Metal J-Head hotend 1.75mm / 0.4mm nozzle 1 x 24 40W Heater with 1 meter long wiring 1 x NTC3950 Thermistor wuth 1 meter long wiring 1 x Heatsink Shroud with High Speed Fan 3010 24V 0.13A 1 x One Meter long Bowden tubing 4mm OD 2mm ID. 1 x PC4-01 threaded 1/8 inch NPT fitting 1 x Thermal Protection Silicone Sock Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.