Kimtech Pure W4 Wipers are a range of high-performance wiper solutions, suitable for ISO Class 4 or higher clean-room environments. Perfect for dry wiping of critical equipment and surfaces in pharmaceutical, high-tech biotechnology, medical device and food processing industries. These 100 percent polypropylene, white base sheets are acid, base and solvent resistant. Thermally bonded without glue or binding, the wipes have straight, clean, knife-cut edges to minimise lint. Measuring L228 x W228m, these W4 wipers are doubled-bagged with a case liner. Supplied in a pack of 5 (each pack contains 100 wipes).