KIMTECH PURE CL4 PreSat Alcohol Wipe - 9 X 11. 100 percent Polypropylene base sheet with 70 percent Isopropyl Alcohol / 30 percent Deionized Water. Recommended for surface wiping in ISO Class 4 or higher cleanroom environments. Ideal one-step application of alcohol to critical surfaces. Contains semiconductor grade alcohol. Resealable pouch.