Diameter:87.5mm/3.44";Inner Diameter:28.5mm/1.12". Replacement for KFX50 KSF50 2007-2009/2013-2017 21003-Y003 Magneto Engine Stator Generator.. Made of metal and plastic.It is durable to use.. In addition to simply increasing the amount of coil windings in the generator stator coil,the coil copper itself is also thicker,which improves durability..
