Type III HA Black MDX-22.3 Head (previously known as the MD2 Head). The opening at the front of the head is 22.3mm. It comes with an aluminum lamp retaining washer, head gasket and lens. This will fit the MD2, MD3, And MD4 bodies. All M series dropins will physically fit this head. It is up to the end user to determine that the voltage is correct.
Does Not Include M Series Lamp Assembly!