MANN FILTER

Filters for Gas Developing Materials and Fluids-Namely, for Air,[ Gases], Fuels,[ Combustible Materials ]and Oils, Filter Inserts, Comprising Porous Materials-Namely, [Paper, Pulpboards, Asbestos], Felt, [Siliceous, Ceramic Materials,] Also as Metallic, Natural and Synthetic Fiber, [Webs,] Fabrics [and Knittings,] and Their Parts