PA25. Nemesis Mod Magnet Switch Converter--5set(2pc /set) The Nemesis magnet switch washers is a simple quick way to convert your spring loaded firing button into a magnet switch. The springs can weaken over time, and switching to magnets can prolong your button firing. The 2 magnetic washers are made from Nd, Fe, B and other metal elements to create a nice strong polarity. Price: $10.00 Unit: set of 10 Quantity: