Designed for in-line filtration of liquids or gases. Particularly useful for in vitro laboratory experiments. Holder is made of tough, transparent polycarbonate, so assembly can be checked and filtration can be observed. Unit can be used for either vacuum or pressure filtration. Unscrew unit to insert 47 mm. membrane, which is supported on both sides by polypropylene plates. Biologically inert silicone 0-ring seals the membrane and prevents bypass. Removable tubing connectors on either end fit 3/8 inch I.D. tubing. Holder with membrane is fully autoclavable. Overall length, including tubing connector: 100 mm. (nominal). Diameter 65 mm. (nominal).