BACTERIAL / VIRAL SPIROMETRY FILTER WITH MOUTHPIECE FOR PEDIATRIC AND ADULT USE   Minimize the contamination and infection risk Adaptable for use with all leading Pulmonary Function Testing equipment High Filtration - Low Resistance Single Patient Use Manufactured in accordance with MDD 93/42/EEC Bacterial - Viral Electrostatic Media OEM Partner: 3M USA BFE & VFE tested and reported by Nelson Laboratories in Utah, USA Packed individually Bacterial filtration efficiency: 99.99% Viral filtration efficiency: 99.99% Airflow resistance: < 0.7cm H2O @ 720 Lpm Dead space: <75 ml Filtration method: electrostatic & mechanic Weight: 40 gram Model: with mouthpiece Special design of mouthpiece for lips not to slide Patients: adults and pediatrics No need to use different-sized filters for adults and pediatrics