It's tough to get past Hollingsworth & Vose Company unless you're squeaky clean -- they filter out the riff-raff. The company manufactures products for engine filtration, air and liquid filtration, and battery separators using nonwoven materials. It also makes advanced composites as well as technical, filter, and specialty papers. The company's engine and industrial filtration products are made to perform in harsh environments and are used in automotive air, automotive lubrication, diesel, fuel, hydraulic, oil, and other specialty filtration applications. Hollingsworth & Vose's battery separators are made with uniform pore structure, chemical stability, and high wicking and absorbency.