3M™ 4" X 4 1/2" X 8 1/2" Filter Retainer is ideal for holding 3M particulate filters 5N11 and 5P71/07194(AAD) in place on top of 3M 6000 series cartridges. Respiratory protection system component is best suitable for assembly, cleaning, grinding, machine operations, painting and welding operation. It finds wide range of application in automotive, construction, food, beverage, manufacturing, military maintenance, mining, oil, gas, pharmaceutical, transportation, metal production and fabrication industry.