Wago 4 level matrix patch terminal block din 35x15mm lock alphabetic 727 series wago 727 229022 000 wago 727 229022 000 4 level matrix patching terminal block with locking clips for din rail 35x15mm 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 grey 50pcs wago 727 229022 000 4 level matrix block a d d a lock din 15mm grey 50pk