Bacterial Air Vent Recommended for small-volume venting and degassing. Can be sterilized by autoclaving. Polypropylene housing. 1um nominal pore size 1um hydrophobic glass laminate filter. 6.4-9.5mm stepped hose barbs 5.2 bar maximum pressure. 4.5dia.x5.3Lcm. 7.5cm2 effective filtration area.