This sample bag of the F50 Industrial Felt gives you a 3 inch x 3 inch square of 1/16 inch and 3/32 inch thickness. SAE F-50 Felt is made of 95% off-white wool and has a density of 0.32-0.36 g/cm3. F-50 is recommended for ball and roller bearings, oil retainer washers and smaller dust excluding washers, and also for mechanical purposes when an accurate, thin, smooth, high grade felt is required. This sample bag is a perfect way to match and select your grade of felt and be able to physically feel the felt. These can be kept in your swatch library to refer back to or for applications that need a smaller amount of industrial felt to work with.