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 FDM 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.