... , cleaning wafer,precise instrument,semiconductor/SMT/PCB,optical products.. Clean room Wiper Features 1. Superb absorbency, excellent cleaning performance ... by 18M Ohms ultra-pure water, packaged in class 10 clean room 6. Very delicate texture, super soft, cleaning ... precision instruments and equipments 4) Widely used in medical facilities, laboratory 5) Ideal for using in class 100 cleanroom, etc. ...