Feature:[Durable Material] Nozzles are made of brass, well abrasion resistance, heat resistance, and corrosion resistance, sturdy construction makes them durable to serve you for a long time.[Features] The inner wall of the 3D printer extruder nozzle is smooth and has no burrs. Keep a stable temperature during printing, let the filament out evenly, and create a more perfect printer item than a normal metal nozzle.[Applicability] Suitable for common 1.75 mm 3D printer filaments, but also can print filaments of carbon fiber, fiberglass, etc.Specification:Material: BrassScrew Thread: M6Nozzle Diameter: 0.25mmTotal Length: 12.5mm/0.49"Distance Across Sides: 5mmPackage Content:20 x Brass Nozzle.