The 9V battery snap on type 6 Flex cable should be used with 9V battery powered pedals which don’t have an adapter input socket e.g. vintage Wah pedals or some MXR or Roger Meyer fuzz ...
This black type 5 Flex cable with a 3,5mm mini jack plug should be used to power some older Electro-Harmonix, DOD, some Wah or RAT pedals, the KLON Centaur and many others.
This Flex cable type should be used to power all Eventide Factor and H9 pedals, older 4-button modelers from Line 6 like the DL4,, some older 18, 24 or 40V Electro-Harmonix pedals and most of ...
This standard is less popular but also widely used in all Moogerfooger or Radial Tonebone pedals, a few Empress, Diamond and Kingsley pedals, the '69 Pedal, Soulbender or Octafuzz from Fulltone or older positive ground ...
Also calleded the BOSS standard. This Flex type should be used to power the vast majority of the pedals on the market like BOSS, TC Electronic, Strymon, Dunlop, MXR, Catalinbread, ZVex and many many more.