Wago 4 level matrix patch block din 35x75mm no lock alphabetic 727 series wago 727 222022 000 wago 727 222022 000 4 level matrix patching terminal block without locking clips for din rail 35x75mm marked a b c d d c b a complies with en60715 4 x pair wise connection of clamping units on the same level colour white 50pcs wago 727 222022 000 4 level matrix block a d d a no lock din 75mm white 50pk