The 90mm vacuum microfiltration assemblies are designed for large sample volumes or samples with high particulate loads that would tend to clog a 47mm diameter filter. Filtration rates are up to four times faster than 47mm filters. The funnel is graduated from 300 to 1000mL in 50mL increments. Maximum funnel capacity is 1100mL. Prefilter size is 70mm diameter and the approximate filter area is 38.5cm2. Connection to 1 liter filtration flask (available as an accessory) is made with a No. 8 silicone stopper. with Replaceable Fritted Glass Support Used for general filtration. The fritted glass support disc can be replaced if it becomes clogged or exchanged if sample to sample cross contamination is a concern. This unit is supplied with a coarse fritted glass support disc, glass support base, 1 liter graduated funnel, anodized aluminum clamp, and a No. 8 silicone stopper.