Rectangular neodymium grate magnets provide a properly configured, high-density magnetic field to trap and hold ferrous fines, fragments, and small metal objects. Achieve your magnetic separation goals in a wide range of applications, including coffee grinders. These grate magnets are designed to be durable and reliable, with stainless steel tubing and frames welded into strong, integral units. The average Gauss on the surface of the cartridge is 4,200 (max peak 10,000) with an average pull strength of 1.4lbs (with a 1/4″ ferrous ball) and 5.4lbs (with a 1/2″ ferrous ball). They can be installed – or simply laid – inside hoppers, housings, and bins – and easily removed for cleaning. Grates are built for low-abrasion applications and should measure at least twice the size of your outlet opening, so as not to restrict product flow.