A <a href="https://www.harvardfiltration.com/product/spin-on-elements/" rel="dofollow">spin on filter</a> is a type of filter that uses centrifugal force to remove contaminants from a fluid stream. The filter has a rotating element that spins the fluid, causing the heavier particles to be flung to the outer edges and collected in a filter element. This type of filter is commonly used in industrial and automotive applications.