Package Included: 6Pcs 0.4mm hardened steel nozzles. Only fit for A1/A1 Mini 3D printers. Please Note: The original-hotend cannot be disassembled,this nozzle kit is only suitable for upgrading a hot end heat block kit that uses a detachable nozzle. The removable hotend and nozzle can reduce running costs. Super Tungsten Material: These nozzles are made of high-quality hardened tungsten steel. The hardness is over HRC60 can reduce the abrasion to the inner and outer of the nozzle during long-time printing, It more heat- and harder than brass nozzles, which makes it accurate and compatible with more filaments. High-Temperature Resistance: The max temp of this hardened tool steel nozzle could reach 500℃, suitable for 3D printing at high temperatures, It is Suitable for most materials such as 1.75mm PLA, ABS, PETG, TPU, PP, PC, NYLON, , PEI, etc. High Precision: These 3D printer nozzles keep a stable temperature during printing and let the filament out evenly, creating a more perfect printer item than a normal metal nozzle. Not easily clogged during printing, easy to clean. Size:0.4mm Compatible with:For A1/A1 Mini Compatible Filament:1.75mm PLA, ABS, PETG, TPU, PP, PC, NYLON, , PEI, etc Color:As Shown Material:Hardening steel Package Contents: 6 * 0.4mm hardened steel nozzles Only the above package content, other products are not included. Note: Light reflection 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.