Welcome to our store! Metal Bar: Fine craftsmanship and improved functions, not only supports electrical conduction, but also supports heat conduction, solving the heat problem after long time use. Buckle: integrated insertion design. Simply press the buckle to easily remove and replace the heating ring and nozzle. Pen tip: The printing pen tip temperature is only 70-80, which will not cause burns. Aviation non-metallic materials, high temperature resistant and safer to use. Nozzle change method: To prevent damage to the nozzle buckle, two small screwdrivers should be inserted into the card slot at 45 as shown in the figure, and the pen tip will fall off with light pressing. Built to strict quality control standards, the design has been improved for durability. Feature: 1. Metal Bar: Refined craftsmanship and improved functions, not only supports electrical conduction, but also heat conduction, solving the problem of heat after long time use. 2. Buckle: integrated insert design. Simply press the buckle to easily remove and replace the heating ring and nozzle. 3. Pen tip: The printing pen tip temperature is only 70-80, which will not cause burning. Aviation non-metallic materials, high temperature resistant and safer to use. 4. Method for changing the nozzle: In order to avoid damaging the nozzle buckle, two small screwdrivers should be inserted into the card slot at 45 as shown in the figure, and the pen tip will fall out with a slight push. 5. Built to strict quality control standards, the design has been improved for durability. Specifications: Item Type: Printing Pen Accessories Shipping quantity: 1 piece(s)12V Product color: Black Product size: 1.75mm Note: Manual measurement, please allow 1 - 3cm error!!! 100% Satisfaction - Our customers are our priority. If you find any problems with the products after receiving the goods, such as damage and incorrect quantity, please contact us immediately. We do our best to provide you with satisfactory after-sales service.