It looks like you're referencing a specific product from Albion Engineering Company. The F4M Threaded-Type Static Mixer you mentioned features 20 elements, has a 3/4" NPT (National Pipe Thread) connection, and is 15 inches long with a 3/4" inner diameter (ID). Static mixers are typically used for blending fluids and ensuring thorough mixing without the need for moving parts, making them ideal for various industrial applications.
If you have any specific questions about this product or need further information, feel free to ask!