Two 25mm monitor types are available: a 3-piece polystyrene monitor with 16mm center ring and female Luer slip vacuum connection, and a 3-piece carbon-filled polypropylene conductive monitor with 50mm extension cowl. Aerosol analysis monitors are available with 0.45?m and 0.8?m cellulose esters membranes. Matched weight monitors contain two filters matched in weight to within 0.1 mg, eliminating test filter pre-weighing in gravimetric analysis. Pore size (?m): 0.8 / 5.0. Filter diameter: 25mm. Filter code: AAWP. Filter color: white. Filter surface: plain. Sterility: non-sterile. Filtration area, cm squared: 4.