Biofree additive is moulded into all the plastic components to provide continuous antibacterial and antifungal protection. It continues to clean the pen of microbes and other pathogens as you use it and it does not wear away. It is the perfect choice for a wide range of markets, including pharmaceutical, medical, food retail and many more in the healthcare sector. The Spirit Biofree provides a guarantee of continuous, durable and effective protection based on over 50 years of successful pioneering work in this field.