Made from PLA, this 3D printing pen uses odorless safety plastic filament, ensuring a safe and pleasant printing experience. With a diameter size of 1.75mm, the pen provides precise control and smooth operation for accurate 3D printing. Boasting a shelf life of 2 years, this 3D printing pen offers long-lasting use and value for money. Perfectly designed for 3D printing, this pen helps create intricate designs and detailed models with ease.