Kimtech Pure W4 Wipers 7605 - 5 bags x 100 sheets, white Kimtech® Pure W4 wipers are a range of high-performance wiper solutions, suitable for ISO Class 4 or higher clean-room environments. They are perfect for dry wiping of critical equipment and surfaces in pharmaceutical, high-tech biotechnology, medical device and food processing industries. 100% Polypropylene white base sheets that are acid, base and solvent resistant, thermally bonded with no glue or binding and straight, clean, knife-cut edges with minimal lint. W4 Wipers are doubled-bagged with a case liner. Individual sheet size 30.4cm (L) x 30.4cm (W). 5 bags x 100 sheets, white (500 total)