Magnetic drain plug for your rear differential. M22*1.5*9 low profile design. Let the magnet catch the loose metal particles and find possible issues before they become very expensive to fix. Replaces BMW PN 33 11 1 525 064. Made by Dimple Products. Dimple branded neodymium magnets stay magnetized at over 300 degrees Fahrenheit. Most other magnetic drain plugs lose magnetization at 175 degrees Fahrenheit.