It is a combination of a linen substrate and a phenolic resin binder in which a solid lubricant, molybdenum di-sulfide, is suspended. It is used when better machining than that offered by canvas grades and non-conducting internal lubrication are needed. NP322 operates with less noise than metal and can be used in explosion-proof environments. It is suitable for smaller and more intricate shapes than those made with NP313. This product is commonly used to make a variety of parts that are subject to wear.