Wago 4 level matrix patch block din 35x15mm no lock alphabetic 727 series wago 727 234024 000 wago 727 234024 000 4 level matrix patching terminal block without locking clips for din rail 35x15mm marked d c b a a b c d for atex applications complies with en60715 4 x pair wise connection of clamping units on the same level colour blue 50pcs wago 727 234024 000 4 level matrix block d a a d no lock for atex blue 50pk