Wago 4 level matrix patch terminal block din 35x75mm no lock plain 727 series wago 727 220 wago 727 220 4 level matrix patching terminal block without locking clips for din rail 35x75mm plain complies with en60715 4 x pair wise connection of clamping units on the same level colour grey 50pcs wago 727 220 4 level matrix block plain no lock din 75mm grey 50pk