This pen uses a 2.0mm lead core and the back cover also has the function of sharpening the lead. The sturdy and solid brass body provides good balance and stability. This is a beautiful drawing pen and a reliable tool for work and creation. The products are produced in Taiwan, combining Taiwanese design and traditional industrial technology, and telling Taiwan's local life culture. The boxwood box contains the product concept manual and has information on the type of consumables that can be replaced. specification Material: brass, paulownia wooden box packaging Product size: 11x11x157 mm Wooden box size: 77x31x190 mm Applicable lead: 2.0 mm lead Use and maintenance: The color of copper varies depending on the way it is used and the storage environment. The unique texture that comes with time is its charm. The oxides produced by the change are harmless. When they are wiped with copper oil, the beautiful luster of the copper color can be restored. Shipping instructions: After payment, the goods are shipped from stock to delivery for 3 working days. (excluding holidays) The home delivery staff may contact you before delivery, so please keep your mobile phone or local calls open. After the Super-commercial goods are delivered to the designated outlets, you will be sent a SMS and email to inform you.