Polycarbonate filaments are frequently used in 3D printing due to their durability and strength. This type of filament is often used for transparent items that need to withstand wear and tear, such as enclosures, phone cases, and glasses. Polycarbonate is also onesolide clearest plastics available, making it ideal for applications where transparency is desired. While polycarbonate filaments are strong and impact-resistant, they are not unbreakable. Polycarbonate can become scratched over time. However, overall, polycarbonate is a versatile and reliable material that can be used for a variety of 3D applications.