Product Description:BFE ≥99.99% Filter material for BV filter and HME filter we are the manufacturer The Bacterial Viral Filter Paper is a highly efficient and effective medical filter designed for a variety of applications, including HME filter, BV filter, and spirometry filter. This versatile filter paper offers superior protection by providing a Bacterial Filtration Efficiency (BFE) of ≥99.99%, ensuring the filtration of harmful bacteria and viruses. With a diameter