The Type 4 Flex Cables are green and fitted with a center positive (reverse polarity) with the 2.5mm sized DC plug. This Flex cable type is mainly used to power all Eventide Factor and H9 pedals, old big box Line 6 pedals (DL4, MM4, FM4, etc..) as well as the M5 and M9 series, Boomerang Phrase Sampler, and is widely used for many AC pedals. This Flex cable is available in three lengths 30, 50 or 80cm.