SAE F-3 Thickness: 1"-1/16" Size: 36"*36" S.A.E. F-7 pressed felt technical dataMedium density felts similar to SAE F-5 and recommended for similar applications, but where slightly less durable material is permissible. These felts are commonly used for grease retainers, spacer strip seals, weather stripping, dust shields, and noise reduction linings