[Packing List] 5Pcs 0.4mm Hardened Steel V6 Nozzles, 5pcs needles | [Notification] Please check the picture and make sure V6 nozzle is suitable for your 3D printer in advance. | [Higher Temperature] SIMAX3D Hardened Steel V6 Nozzle is able to stably heat up quickly with higher temperature to support special filament printing like TPU, Wood PLA, Carbon Fiber. | [Durable] It has a good thermal conductivity to let the filament flows smoothly and meanwhile less cogging for CR10, Ender 3 series, Prusa i3, etc. | [Warranty] We respect every customer. So every stepper motor passed QC before shipment. But if you have problem, we still provide free return/exchange in 90 days, pls contact us.