SK metal filters, for Climate control door/Section doors, for SK 3300, WHD: 425 x 78 x 10 mm, Metal filters, Aluminum, 425 mm, 78 mm, 10 mm, 16.7 in, 3.07 in, 0.39 in, 76169100, 1 pc(s), 0.441 lbs, 4028177566163, The use of washable metal filters is recommended, particularly in environments with dusty or oily ambient air. If air or steam condenses on the metal surfaces, any particles that may be present will adhere to the metal and are easily washed out with water or grease-dissolving detergents.