Whatman Polydisc 50 mm in-line disc filters are designed for larger volume sample filtration in the laboratory, at a pilot plant or in manufacturing. They are extremely versatile and cost effective. Sample volumes up to 1 liter can be filtered with one device. Polydisc devices can be used in conjunction with a syringe or connected in-line (6-10 mm ID hose) via stepped hose barbs. The Polydisc TF features a hydrophobic PTFE membrane which is ideal for chemically aggressive solutions, reagents and organic solvents. This lightweight unit is particularly suitable for protective vents and for in-line filtration and isolation applications. The 1 ¬µm device features a polypropylene prefilter for use with heavily contaminated samples. Autoclavable.