Foamex/Wilshire UltraSORB Wipers Foamex Asia WCC Pack. Combining top-notch and uncompromising quality with an affordable price the Foamex/Wilshire UltraSORB Wipers Foamex Asia WCC HT4699/ 10810-904 can fulfill your laboratory needs while still offering a great value for the money. Product Category Description: Wipers are made from a fully cross-linked naturally hydrophillic polyurethane foam and laundered with a proprietary process in an ISO Class 4 (FED-STD-209E Class 10/M2.5) environment. They are engineered specifically to minimize contaminants released from the wiper while maximizing the amount of particulates and residue removed from surfaces. UltraSORB wipers also offer outstanding wet tensile strength and abrasion resistance. The particle-trapping properties of these wipers combined with their abrasion resistance thermal stability solvent-resistance non-pyrogenicity sponge-like feel and softness make them suitable for the wipedown of ISO Class 3 and Class 4 (FED-STD-209E Class 1/M1.5 and Class 10/M2.5) cleanrooms optical surfaces and hot and aseptic fill areas. UltraSORB foam has a 3 lb./ft3 density. Specifications for Foamex/Wilshire UltraSORB Wipers Foamex Asia WCC HT4699: Dimensions cm (in.): 22.9 x 22.9 (9 x 9) Thickness mm (in.): 3.18 (1/8) Wilshire No.: HT4699 Unit: Pack contains 50 wipers; Case contains 25 Packs Particle Generation (>=0.5 m) Biaxial Shake (IES Test Method):