Precise machining, smooth surface and precise hole position. Consistent with the traditional compatible with E3D v6 assembly size. It is also possible to remove the quick connector and use a threaded assembly. Perfect compatible with VORON/KOSSEL and other models.The nozzle, heating block and throat are made of copper-plated material, which makes the heating more unicompatible withm, the inner wall is smooth, and the extrusion is smooth. The nozzle will not oxidize and cause the inner wall to become rough. CNC finishing. The output is not false, even and delicate.Unique design, reconfigured design of radiator, more excellent heat dissipation percompatible withmance, upgrade of throat pipe design, greatly improve the heat dissipation efficiency of throat pipe, reduce the probability of throat pipe blockageThe overall high temperature resistance of 500 , durable and wear-resistant, surface anodized, beautiful atmosphere.Compatible models: compatible with VORON series printersNozzle aperture: 0.4mm/1.75mmApplicable consumables: PLA/ABS/PC/PETG/PA/WOOD/PP/carbon fiber/TPUMaterial:copper platedcolour:RedPackage Contents:1 * k1 HotendOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.