CY-FS750 Anti-static Cleanroom Swab is constructed from compressed, 100 ppi (Z) open-cell polyurethane foam that is free from organic ... contaminants such as silicone, amides or phthalate esters. The foam is thermally bonded to the handle, thus, eliminating the ... Laundered and packed under an ISO Class 4 Cleanroom, the foam exhibits low particulate and ionic content. It has excellent compatibility ...