This listing is for one brush housing that is made to be paired with gumball or capsule wheels for Northwestern Super 60,  Model 60, PN95, and many other similar machines.  If you aren't sure if it will work with your machine, contact us first and send pics so we can help you before a purchase.  There are several styles that all function the same: metal with 3 or 4 springs, and plastic with 3 or 4 springs.  We ship at random unless you message us after you pay with your request.