Detailed Product Description Miracleans Kleentips Foam Swab FS 742 features a cleanroom laundered, 100 ppi (Z) open cell ... support in cleaning small and confined areas. Kleentips Foam Swabs FS 742 are free from organic contaminants such as silicone, amide ... -volatile residue (NVR), ion content and particle generatation. Universal Swabs FS 742 are excellent in cleaning static sensitive components