The Techspray/Chemtronics 1608-100DSP are convenient, low-linting wipes pre-saturated with 70% pure Isopropyl Alcohol (IPA). The 1608-100DSP is a great way to quickly clean contaminated surfaces. Made of Nonwoven Polyester Material (1608) and engineered for high volume PCB assembly and other types of production. This cellulose-poly material has greater absorbency and is less likely to snag or shred, making these wipes ideal for stencil and PCB cleaning. This tub contains one hundred 5 inch by 8 inch wipes per roll.