workmanship: this II replacement tip is made of High- materials, the tip of the pen is thin, can better help you to position, complete the exquisite handicraft. replacement: this II replacement tip is the replacement of the pen , quick replacement, simple operation, not delay you anything. include: 4 pieces II replacement tips. it can satisfy your daily use and replacement needs and convenient: this II replacement tip is , when it is not applied, it does not occupy a position on the side, save space. Instructions for use: after using the II replacement tips, when the wire of the pen nib has not been completely cooled, touching objects or scald.the wire of the pen nib becomes and deforms after . therefore, cover the pen cap when it is not in use to prevent it from being and unable to be applied normally.