The Polycap™ HD (Heavy Duty) family of disposable filter capsules offers both high filtration efficiency and extreme purity due to the materials and methods of manufacture. Filter media is monofilament anisotropic polypropylene (MAPP). Four ratings, two sizes. Polycap™HD devices provide the field of laboratory filtration with an unique new tool, offering a broad capability between the gross paper filters and the microporous membranes used for absolute filtration. Typical applications include general fine filtration, prefiltration, clear air/gas, sample preparation, solvents, buffers and reagents. All Polycap™ HD devices are vented. Polycap™ 36 devices have a 400 square centimeter filtration area while Polycap™ 75 devices have an 850 square centimenter filtration area. Connection code: (S) = stepped barb for ¬º" to 3/8" tubing, (SB) = stepped barb for 3/8" to ¬Ω" tubing.