Wago 4 level matrix patch terminal block din rail 35x15mm lock plain 727 series wago 727 229 wago 727 229 4 level matrix patching terminal block with locking clips for din rail 35x15mm plain complies with en60715 4 x pair wise connection of clamping units on the same level colour grey 50pcs wago 727 229 4 level matrix block plain lock din 15mm grey 50pk