●12pcs for 8 cylinder vehicles , more will works great. fit good on the spark plug wire. ●wire separators made of aviation aluminum ,Fixed and organized the engine wires perfectly ●wire separators great for 8MM/9MM/10MM wires.used for the sprak plugs wire. well protect the wires ●Fixed and organized the engine wires perfectly .makes sprak plugs wire and the engine bay look neat. ●With one allen key ,easier to install than the plastic one .Easy to take it apart and put it back together under the hood.