Designed for bacteriological analysis where it is necessary to sterilize the filter holder with the membrane filter in place. The glass surface is coated with PTFE to avoid filter damage and membrane adhesion during autoclaving. Complete set includes a PTFE-faced borosilicate glass funnel and PTFE-faced base, anodized aluminum spring clamp, and perforated silicone stopper. Parts are also available separately. Filter Diameter: 47mm, Filtration area is 9.6cm². Capacity: Funnel: 300ml, Flask: 1L. Outlet fitting: 6mm (1/4") O.D. tabulated cap sidearm to vacuum.