Wago 4 level matrix patch block din 35x75mm no lock alphabetic 727 series wago 727 224022 000 wago 727 224022 000 4 level matrix patching terminal block without locking clips for din rail 35x75mm marked a b c d d c b a for atex applications complies with en60715 4 x pair wise connection of clamping units on the same level colour blue 50pcs wago 727 224022 000 4 level matrix block a d d a no lock for atex blue 50pk