Description: Features:100% brand new and high quality.Made of high temperature resistant plastic, environmental safety, use at ease.Innovative design, easy to remove.Thermal conductive function, solving the problem of heat dissipation.Suitable comptiable with replacing broken 3D stereoscopic printing pen nozzle.This nozzle fit comptiable with 3D printing pen, it can't be repalced comptiable with second generation 3D printing pen. Specifications:Name: 3D Printing Pen Head NozzleMaterial: PlasticColor: BlackSize: (LDia) 52cm / 1.970.79in (Approx.)Fit comptiable with: First generation 3D printing printer penApplication: 3D printingQuantity: 1PC (other accessories demo in the picture is not included) Note:1.Transition: 1cm=10mm=0.39inch2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind becomptiable withe you bid.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you4.No retail package Package includes:1 X 3D Printing Pen Head Nozzle