Edelbrock 4236 Elite Series Oval Air Cleaner Red filter is made of a cotton gauze material The black anodized wing nut is knurled Length of the air cleaner is 13.5 inch and width is 7 inch Oval air cleaner is polished with the Edelbrock logo Height from the gasket flange to the top of the supplied retaining nut is 3-1/2 inch